diff --git a/js/js.libraries/src/js/callableReferenceUtils.js b/js/js.libraries/src/js/callableReferenceUtils.js
index 7d9bf8716f5..ffe7cae3af0 100644
--- a/js/js.libraries/src/js/callableReferenceUtils.js
+++ b/js/js.libraries/src/js/callableReferenceUtils.js
@@ -54,7 +54,7 @@ var propertyRefClassMetadataCache = [
 function getPropertyRefMetadata(cache) {
     if (cache.value === null) {
         cache.value = {
-            baseClasses: [cache.implementedInterface()],
+            interfaces: [cache.implementedInterface()],
             baseClass: null,
             functions: {},
             properties: {},
diff --git a/js/js.libraries/src/js/rtti.js b/js/js.libraries/src/js/rtti.js
index bcc271191ee..51b3c9cdd34 100644
--- a/js/js.libraries/src/js/rtti.js
+++ b/js/js.libraries/src/js/rtti.js
@@ -55,15 +55,15 @@ Kotlin.callSetter = function (thisObject, klass, propertyName, value) {
 function isInheritanceFromInterface(metadata, iface) {
     if (metadata == null) return false;
 
-    var baseClasses = metadata.baseClasses;
+    var interfaces = metadata.interfaces;
     var i;
-    for (i = 0; i < baseClasses.length; i++) {
-        if (baseClasses[i] === iface) {
+    for (i = 0; i < interfaces.length; i++) {
+        if (interfaces[i] === iface) {
             return true;
         }
     }
-    for (i = 0; i < baseClasses.length; i++) {
-        if (isInheritanceFromInterface(baseClasses[i].$metadata$, iface)) {
+    for (i = 0; i < interfaces.length; i++) {
+        if (isInheritanceFromInterface(interfaces[i].$metadata$, iface)) {
             return true;
         }
     }
diff --git a/js/js.translator/src/org/jetbrains/kotlin/js/translate/context/Namer.java b/js/js.translator/src/org/jetbrains/kotlin/js/translate/context/Namer.java
index 141652dcfeb..f7426a424e1 100644
--- a/js/js.translator/src/org/jetbrains/kotlin/js/translate/context/Namer.java
+++ b/js/js.translator/src/org/jetbrains/kotlin/js/translate/context/Namer.java
@@ -97,7 +97,7 @@ public final class Namer {
 
     public static final String LOCAL_MODULE_PREFIX = "$module$";
     public static final String METADATA = "$metadata$";
-    public static final String METADATA_SUPERTYPES = "baseClasses";
+    public static final String METADATA_SUPERTYPES = "interfaces";
     public static final String METADATA_SIMPLE_NAME = "simpleName";
     public static final String METADATA_CLASS_KIND = "kind";
     public static final String CLASS_KIND_ENUM = "Kind";