diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/EnumTest.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/EnumTest.java
index 23a3af2e1e6..4be7bf3acab 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/EnumTest.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/EnumTest.java
@@ -62,4 +62,8 @@ public class EnumTest extends SingleFileTranslationTest {
     public void testInitializationOrder() throws Exception {
         checkFooBoxIsOk();
     }
+
+    public void testImplementsComparable() throws Exception {
+        checkFooBoxIsOk();
+    }
 }
diff --git a/js/js.translator/testData/enum/cases/implementsComparable.kt b/js/js.translator/testData/enum/cases/implementsComparable.kt
new file mode 100644
index 00000000000..7477e54b056
--- /dev/null
+++ b/js/js.translator/testData/enum/cases/implementsComparable.kt
@@ -0,0 +1,14 @@
+package foo
+
+enum class A {
+    X,
+    Y
+}
+
+fun box(): String {
+    val a : Any = A.X
+    assertEquals(0, (a as Comparable<A>).compareTo(A.X))
+    assertTrue((a as Comparable<A>).compareTo(A.Y) < 0)
+
+    return "OK"
+}
\ No newline at end of file
diff --git a/js/js.translator/testData/kotlin_lib.js b/js/js.translator/testData/kotlin_lib.js
index 06111c172fa..bc33ca05586 100644
--- a/js/js.translator/testData/kotlin_lib.js
+++ b/js/js.translator/testData/kotlin_lib.js
@@ -340,7 +340,10 @@
             }
     });
 
-    Kotlin.Enum = Kotlin.createClassNow(null,
+    lazyInitClasses.Enum = Kotlin.createClass(
+        function() {
+            return [Kotlin.Comparable];
+        },
         function () {
             this.name$ = void 0;
             this.ordinal$ = void 0;
@@ -665,19 +668,19 @@
             }
         });
 
-    Kotlin.Runnable = Kotlin.createClassNow(null, null, {
+    Kotlin.Runnable = Kotlin.createTraitNow(null, null, {
         run: throwAbstractFunctionInvocationError("Runnable#run")
     });
 
-    Kotlin.Comparable = Kotlin.createClassNow(null, null, {
+    Kotlin.Comparable = Kotlin.createTraitNow(null, null, {
         compareTo: throwAbstractFunctionInvocationError("Comparable#compareTo")
     });
 
-    Kotlin.Appendable = Kotlin.createClassNow(null, null, {
+    Kotlin.Appendable = Kotlin.createTraitNow(null, null, {
         append: throwAbstractFunctionInvocationError("Appendable#append")
     });
 
-    Kotlin.Closeable = Kotlin.createClassNow(null, null, {
+    Kotlin.Closeable = Kotlin.createTraitNow(null, null, {
         close: throwAbstractFunctionInvocationError("Closeable#close")
     });