diff --git a/criteria/common/src/org/immutables/criteria/expression/Expressions.java b/criteria/common/src/org/immutables/criteria/expression/Expressions.java
index 20fe1fa4c..ab8095e71 100644
--- a/criteria/common/src/org/immutables/criteria/expression/Expressions.java
+++ b/criteria/common/src/org/immutables/criteria/expression/Expressions.java
@@ -97,9 +97,16 @@ public static Call not(Expression call) {
   }
 
   public static Call unaryCall(Operator operator, Expression arg) {
+    Objects.requireNonNull(arg, "arg");
     return call(operator, ImmutableSet.of(arg));
   }
 
+  public static Call binaryCall(final Operator operator, Expression left, Expression right) {
+    Objects.requireNonNull(left, "left");
+    Objects.requireNonNull(right, "right");
+    return call(operator, ImmutableList.of(left, right));
+  }
+
   public static Call call(final Operator operator, Expression ... operands) {
     return call(operator, ImmutableList.copyOf(operands));
   }
diff --git a/criteria/common/src/org/immutables/criteria/matcher/BooleanMatcher.java b/criteria/common/src/org/immutables/criteria/matcher/BooleanMatcher.java
index 3964be56d..a7c565149 100644
--- a/criteria/common/src/org/immutables/criteria/matcher/BooleanMatcher.java
+++ b/criteria/common/src/org/immutables/criteria/matcher/BooleanMatcher.java
@@ -35,7 +35,7 @@ default R isFalse() {
   }
 
   default R is(boolean value) {
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(Operators.EQUAL, e, Expressions.constant(value)));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(Operators.EQUAL, e, Expressions.constant(value)));
   }
 
   /**
diff --git a/criteria/common/src/org/immutables/criteria/matcher/Combiner.java b/criteria/common/src/org/immutables/criteria/matcher/Combiner.java
index 60aa15685..ea8555376 100644
--- a/criteria/common/src/org/immutables/criteria/matcher/Combiner.java
+++ b/criteria/common/src/org/immutables/criteria/matcher/Combiner.java
@@ -97,7 +97,7 @@ static Call combineAndSimplify(Operator operator, Expression leftExpr, Expressio
     Objects.requireNonNull(operator, "operator");
     if (!(leftExpr instanceof Call && rightExpr instanceof Call)) {
       // regular call which can't be simplified
-      return Expressions.call(operator, leftExpr, rightExpr);
+      return Expressions.binaryCall(operator, leftExpr, rightExpr);
     }
 
     Call left = (Call) leftExpr;
@@ -110,7 +110,7 @@ static Call combineAndSimplify(Operator operator, Expression leftExpr, Expressio
         return Expressions.call(operator, args);
       }
 
-      return Expressions.call(operator, left, right);
+      return Expressions.binaryCall(operator, left, right);
     }
 
     // combine expressions with same operator (AND / OR) into single expression
diff --git a/criteria/common/src/org/immutables/criteria/matcher/ComparableMatcher.java b/criteria/common/src/org/immutables/criteria/matcher/ComparableMatcher.java
index e013042f9..a8f334e8a 100644
--- a/criteria/common/src/org/immutables/criteria/matcher/ComparableMatcher.java
+++ b/criteria/common/src/org/immutables/criteria/matcher/ComparableMatcher.java
@@ -37,7 +37,7 @@ public interface ComparableMatcher<R, V extends Comparable<? super V>> extends O
    */
   default R lessThan(V upper) {
     Objects.requireNonNull(upper, "upper");
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(ComparableOperators.LESS_THAN, e, Expressions.constant(upper)));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(ComparableOperators.LESS_THAN, e, Expressions.constant(upper)));
   }
 
   /**
@@ -46,7 +46,7 @@ default R lessThan(V upper) {
    */
   default R greaterThan(V lower) {
     Objects.requireNonNull(lower, "lower");
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(ComparableOperators.GREATER_THAN, e, Expressions.constant(lower)));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(ComparableOperators.GREATER_THAN, e, Expressions.constant(lower)));
   }
 
   /**
@@ -54,7 +54,7 @@ default R greaterThan(V lower) {
    */
   default R atMost(V upperInclusive) {
     Objects.requireNonNull(upperInclusive, "upperInclusive");
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(ComparableOperators.LESS_THAN_OR_EQUAL, e, Expressions.constant(upperInclusive)));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(ComparableOperators.LESS_THAN_OR_EQUAL, e, Expressions.constant(upperInclusive)));
   }
 
   /**
@@ -62,7 +62,7 @@ default R atMost(V upperInclusive) {
    */
   default R atLeast(V lowerInclusive) {
     Objects.requireNonNull(lowerInclusive, "lowerInclusive");
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(ComparableOperators.GREATER_THAN_OR_EQUAL, e, Expressions.constant(lowerInclusive)));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(ComparableOperators.GREATER_THAN_OR_EQUAL, e, Expressions.constant(lowerInclusive)));
   }
 
   /**
@@ -75,8 +75,8 @@ default R between(V lowerInclusive, V upperInclusive) {
     Objects.requireNonNull(lowerInclusive, "lowerInclusive");
     Objects.requireNonNull(upperInclusive, "upperInclusive");
     final UnaryOperator<Expression> unary = expr -> {
-      final Call lower = Expressions.call(ComparableOperators.GREATER_THAN_OR_EQUAL, expr, Expressions.constant(lowerInclusive));
-      final Call upper = Expressions.call(ComparableOperators.LESS_THAN_OR_EQUAL, expr, Expressions.constant(upperInclusive));
+      final Call lower = Expressions.binaryCall(ComparableOperators.GREATER_THAN_OR_EQUAL, expr, Expressions.constant(lowerInclusive));
+      final Call upper = Expressions.binaryCall(ComparableOperators.LESS_THAN_OR_EQUAL, expr, Expressions.constant(upperInclusive));
       return Expressions.and(lower, upper);
     };
 
diff --git a/criteria/common/src/org/immutables/criteria/matcher/IterableMatcher.java b/criteria/common/src/org/immutables/criteria/matcher/IterableMatcher.java
index 4cefb07e3..588eddee1 100644
--- a/criteria/common/src/org/immutables/criteria/matcher/IterableMatcher.java
+++ b/criteria/common/src/org/immutables/criteria/matcher/IterableMatcher.java
@@ -29,25 +29,25 @@
 public interface IterableMatcher<R, S, V> extends Matcher {
 
   default R contains(V value) {
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(IterableOperators.CONTAINS, e, Expressions.constant(value)));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(IterableOperators.CONTAINS, e, Expressions.constant(value)));
   }
 
   /**
    * Match iterable attribute to be empty (equivalent to {@code iterable.size() == 0})
    */
   default R isEmpty() {
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(IterableOperators.IS_EMPTY, e));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.unaryCall(IterableOperators.IS_EMPTY, e));
   }
 
   /**
    * Match iterable attribute to be NOT empty (equivalent to {@code iterable.size() > 0})
    */
   default R notEmpty() {
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(IterableOperators.NOT_EMPTY, e));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.unaryCall(IterableOperators.NOT_EMPTY, e));
   }
 
   default R hasSize(int size) {
-    UnaryOperator<Expression> expr = e -> Expressions.call(IterableOperators.HAS_SIZE, e, Expressions.constant(size));
+    UnaryOperator<Expression> expr = e -> Expressions.binaryCall(IterableOperators.HAS_SIZE, e, Expressions.constant(size));
     return Matchers.extract(this).applyAndCreateRoot(expr);
 
   }
diff --git a/criteria/common/src/org/immutables/criteria/matcher/ObjectMatcher.java b/criteria/common/src/org/immutables/criteria/matcher/ObjectMatcher.java
index 95182e28a..05b6d3a01 100644
--- a/criteria/common/src/org/immutables/criteria/matcher/ObjectMatcher.java
+++ b/criteria/common/src/org/immutables/criteria/matcher/ObjectMatcher.java
@@ -40,7 +40,7 @@ public interface ObjectMatcher<R, V> extends Matcher {
    */
   default R is(V value) {
     Objects.requireNonNull(value,"value");
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(Operators.EQUAL, e, Expressions.constant(value)));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(Operators.EQUAL, e, Expressions.constant(value)));
   }
 
   /**
@@ -49,7 +49,7 @@ default R is(V value) {
    */
   default R isNot(V value) {
     Objects.requireNonNull(value,"value");
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(Operators.NOT_EQUAL, e, Expressions.constant(value)));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(Operators.NOT_EQUAL, e, Expressions.constant(value)));
   }
 
   default R in(V v1, V v2, V ... rest) {
@@ -75,12 +75,12 @@ default R notIn(V v1, V v2, V ... rest) {
    */
   default R in(Iterable<? extends V> values) {
     Objects.requireNonNull(values, "values");
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(Operators.IN, e, Expressions.constant(ImmutableList.copyOf(values))));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(Operators.IN, e, Expressions.constant(ImmutableList.copyOf(values))));
   }
 
   default R notIn(Iterable<? extends V> values) {
     Objects.requireNonNull(values, "values");
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(Operators.NOT_IN, e, Expressions.constant(ImmutableList.copyOf(values))));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(Operators.NOT_IN, e, Expressions.constant(ImmutableList.copyOf(values))));
   }
 
   /**
diff --git a/criteria/common/src/org/immutables/criteria/matcher/PresentAbsentMatcher.java b/criteria/common/src/org/immutables/criteria/matcher/PresentAbsentMatcher.java
index e669c5d8e..e909ee1c0 100644
--- a/criteria/common/src/org/immutables/criteria/matcher/PresentAbsentMatcher.java
+++ b/criteria/common/src/org/immutables/criteria/matcher/PresentAbsentMatcher.java
@@ -29,12 +29,12 @@
 public interface PresentAbsentMatcher<R> extends Matcher {
 
   default R isPresent() {
-    final UnaryOperator<Expression> expr = e -> Expressions.call(OptionalOperators.IS_PRESENT, e);
+    final UnaryOperator<Expression> expr = e -> Expressions.unaryCall(OptionalOperators.IS_PRESENT, e);
     return Matchers.extract(this).applyAndCreateRoot(expr);
   }
 
   default R isAbsent() {
-    final UnaryOperator<Expression> expr = e -> Expressions.call(OptionalOperators.IS_ABSENT, e);
+    final UnaryOperator<Expression> expr = e -> Expressions.unaryCall(OptionalOperators.IS_ABSENT, e);
     return Matchers.extract(this).applyAndCreateRoot(expr);
   }
 }
diff --git a/criteria/common/src/org/immutables/criteria/matcher/StringMatcher.java b/criteria/common/src/org/immutables/criteria/matcher/StringMatcher.java
index 4fb48df1b..b1108a9df 100644
--- a/criteria/common/src/org/immutables/criteria/matcher/StringMatcher.java
+++ b/criteria/common/src/org/immutables/criteria/matcher/StringMatcher.java
@@ -46,14 +46,14 @@ default R notEmpty() {
    * Apply upper case function to current expression (equivalent to {@code $this.toUpperCase()})
    */
   default StringMatcher<R> toUpperCase() {
-    return Matchers.extract(this).applyRaw(e -> Expressions.call(StringOperators.TO_UPPER_CASE, e)).create();
+    return Matchers.extract(this).applyRaw(e -> Expressions.unaryCall(StringOperators.TO_UPPER_CASE, e)).create();
   }
 
   /**
    * Apply lower case function to current expression (equivalent to {@code $this.toLowerCase()})
    */
   default StringMatcher<R> toLowerCase() {
-    return Matchers.extract(this).applyRaw(e -> Expressions.call(StringOperators.TO_LOWER_CASE, e)).create();
+    return Matchers.extract(this).applyRaw(e -> Expressions.unaryCall(StringOperators.TO_LOWER_CASE, e)).create();
   }
 
   /**
@@ -61,7 +61,7 @@ default StringMatcher<R> toLowerCase() {
    */
   default R contains(CharSequence other) {
     Objects.requireNonNull(other, "other");
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(StringOperators.CONTAINS, e, Expressions.constant(other.toString())));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(StringOperators.CONTAINS, e, Expressions.constant(other.toString())));
   }
 
   /**
@@ -69,7 +69,7 @@ default R contains(CharSequence other) {
    */
   default R startsWith(CharSequence prefix) {
     Objects.requireNonNull(prefix, "prefix");
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(StringOperators.STARTS_WITH, e, Expressions.constant(prefix.toString())));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(StringOperators.STARTS_WITH, e, Expressions.constant(prefix.toString())));
   }
 
   /**
@@ -77,7 +77,7 @@ default R startsWith(CharSequence prefix) {
    */
   default R endsWith(CharSequence suffix) {
     Objects.requireNonNull(suffix, "suffix");
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(StringOperators.ENDS_WITH, e, Expressions.constant(suffix.toString())));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(StringOperators.ENDS_WITH, e, Expressions.constant(suffix.toString())));
   }
 
   /**
@@ -86,14 +86,14 @@ default R endsWith(CharSequence suffix) {
    */
   default R matches(Pattern regex) {
     Objects.requireNonNull(regex, "regexp");
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(StringOperators.MATCHES, e, Expressions.constant(regex)));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(StringOperators.MATCHES, e, Expressions.constant(regex)));
   }
 
   /**
    * Predicate for length of a string
    */
   default R hasLength(int length) {
-    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(StringOperators.HAS_LENGTH, e, Expressions.constant(length)));
+    return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.binaryCall(StringOperators.HAS_LENGTH, e, Expressions.constant(length)));
   }
 
   /**
diff --git a/criteria/common/test/org/immutables/criteria/expression/ExpressionEqualsHashcodeTest.java b/criteria/common/test/org/immutables/criteria/expression/ExpressionEqualsHashcodeTest.java
index c28903e59..66b192e26 100644
--- a/criteria/common/test/org/immutables/criteria/expression/ExpressionEqualsHashcodeTest.java
+++ b/criteria/common/test/org/immutables/criteria/expression/ExpressionEqualsHashcodeTest.java
@@ -70,12 +70,12 @@ void call() throws Exception {
     Path id1 = Path.ofMember(Person.class.getDeclaredMethod("id"));
     Path id2 = Path.ofMember(Person.class.getDeclaredMethod("id"));
 
-    Expression e1 = Expressions.call(Operators.EQUAL, id1, Expressions.constant("1"));
-    Expression e2 = Expressions.call(Operators.EQUAL, id2, Expressions.constant("1"));
-    Expression e3 = Expressions.call(Operators.EQUAL, id1, Expressions.constant("2"));
+    Expression e1 = Expressions.binaryCall(Operators.EQUAL, id1, Expressions.constant("1"));
+    Expression e2 = Expressions.binaryCall(Operators.EQUAL, id2, Expressions.constant("1"));
+    Expression e3 = Expressions.binaryCall(Operators.EQUAL, id1, Expressions.constant("2"));
 
     Path fullName = Path.ofMember(Person.class.getDeclaredMethod("fullName"));
-    Expression e4 = Expressions.call(Operators.EQUAL, fullName, Expressions.constant("1"));
+    Expression e4 = Expressions.binaryCall(Operators.EQUAL, fullName, Expressions.constant("1"));
 
     new EqualsTester()
             .addEqualityGroup(e1, e2)
diff --git a/criteria/geode/test/org/immutables/criteria/geode/OqlGeneratorTest.java b/criteria/geode/test/org/immutables/criteria/geode/OqlGeneratorTest.java
index 2b7ca54bb..3c1497a7c 100644
--- a/criteria/geode/test/org/immutables/criteria/geode/OqlGeneratorTest.java
+++ b/criteria/geode/test/org/immutables/criteria/geode/OqlGeneratorTest.java
@@ -114,7 +114,7 @@ void pathNaming() {
 
     check(generator.withoutBindVariables().generate(Query.of(Person.class)
             .addProjections(type, value)
-            .withFilter(Expressions.call(Operators.EQUAL, select, Expressions.constant(42))))
+            .withFilter(Expressions.binaryCall(Operators.EQUAL, select, Expressions.constant(42))))
             .oql()).is("SELECT type1, value1 FROM /myRegion WHERE select1 = 42");
 
     check(generator.generate(Query.of(Person.class).addProjections(type, value).addGroupBy(type))
diff --git a/criteria/mongo/src/org/immutables/criteria/mongo/FindVisitor.java b/criteria/mongo/src/org/immutables/criteria/mongo/FindVisitor.java
index 912ad5c9c..d04a97e50 100644
--- a/criteria/mongo/src/org/immutables/criteria/mongo/FindVisitor.java
+++ b/criteria/mongo/src/org/immutables/criteria/mongo/FindVisitor.java
@@ -146,7 +146,7 @@ private Bson binaryCall(Call call) {
       if (values.size() == 1) {
         // optimization: convert IN, NIN (where argument is a list with single element) into EQ / NE
         Operators newOperator = op == Operators.IN ? Operators.EQUAL : Operators.NOT_EQUAL;
-        Call newCall = Expressions.call(newOperator, left, Expressions.constant(values.iterator().next()));
+        Call newCall = Expressions.binaryCall(newOperator, left, Expressions.constant(values.iterator().next()));
         return binaryCall(newCall);
       }
       return op == Operators.IN ? Filters.in(field, values) : Filters.nin(field, values);