diff --git a/lib/parser.js b/lib/parser.js
index 7ba67a6be..b2fef5511 100644
--- a/lib/parser.js
+++ b/lib/parser.js
@@ -68,6 +68,9 @@ var selectorTokens = [
 var pseudoSelectors = [
   // Logical Combinations
     'matches'
+  , 'is'
+  , 'has'
+  , 'where'
   , 'not'
 
   // Linguistic Pseudo-classes
diff --git a/test/cases/selectors.pseudo.css b/test/cases/selectors.pseudo.css
index 66188e825..3b7d1e29a 100644
--- a/test/cases/selectors.pseudo.css
+++ b/test/cases/selectors.pseudo.css
@@ -94,3 +94,11 @@ label input:blank,
 label span {
   color: #014;
 }
+label input:has,
+label span {
+  color: #016;
+}
+label input:where,
+label span {
+  color: #017;
+}
diff --git a/test/cases/selectors.pseudo.styl b/test/cases/selectors.pseudo.styl
index 0a655fe3c..1c358261c 100644
--- a/test/cases/selectors.pseudo.styl
+++ b/test/cases/selectors.pseudo.styl
@@ -83,3 +83,13 @@ label
   input:blank
   span
     color #014
+  //  throws illegal unary "==", missing left-hand operand
+  //  input:is
+  //  span
+  //    color #015
+  input:has
+  span
+    color #016
+  input:where
+  span
+    color #017