diff --git a/scalikejdbc-core/src/main/scala/scalikejdbc/RelationalSQL.scala b/scalikejdbc-core/src/main/scala/scalikejdbc/RelationalSQL.scala
index 1ddc1dbe5..5b2fb67e4 100644
--- a/scalikejdbc-core/src/main/scala/scalikejdbc/RelationalSQL.scala
+++ b/scalikejdbc-core/src/main/scala/scalikejdbc/RelationalSQL.scala
@@ -1,5 +1,7 @@
 package scalikejdbc
 
+import scala.collection.compat._
+
 //------------------------------------
 // One-to-one / One-to-many
 //------------------------------------
@@ -7,7 +9,7 @@ package scalikejdbc
 private[scalikejdbc] trait RelationalSQLResultSetOperations[Z] {
 
   private[scalikejdbc] def toSingle(rows: Iterable[Z]): Option[Z] = {
-    if (rows.size > 1) throw new TooManyRowsException(1, rows.size)
+    if (rows.sizeIs > 1) throw new TooManyRowsException(1, rows.size)
     else rows.headOption
   }
 
diff --git a/scalikejdbc-core/src/main/scala/scalikejdbc/StatementExecutor.scala b/scalikejdbc-core/src/main/scala/scalikejdbc/StatementExecutor.scala
index 02d601ecd..86a9459e2 100644
--- a/scalikejdbc-core/src/main/scala/scalikejdbc/StatementExecutor.scala
+++ b/scalikejdbc-core/src/main/scala/scalikejdbc/StatementExecutor.scala
@@ -3,7 +3,7 @@ package scalikejdbc
 import java.sql.PreparedStatement
 
 import org.slf4j.LoggerFactory
-
+import scala.collection.compat._
 import scala.language.reflectiveCalls
 import scala.util.control.NonFatal
 import JavaUtilDateConverterImplicits._
@@ -134,7 +134,7 @@ object StatementExecutor {
                 target,
                 m => {
                   i += 1
-                  if (params.size >= i) {
+                  if (params.sizeIs >= i) {
                     toPrintable(params(i - 1))
                       .replace("\\", "\\\\")
                       .replace("$", "\\$")
@@ -329,7 +329,7 @@ case class StatementExecutor(
         .loggingSQLAndTime(GlobalSettings.loggingSQLAndTime)
         .maxBatchParamSize
         .collect {
-          case maxSize if batchParamsList.size > maxSize =>
+          case maxSize if batchParamsList.sizeIs > maxSize =>
             batchParamsList
               .take(maxSize)
               .map(params => singleSqlString(params))