diff --git a/js/js.dart-ast/src/com/google/dart/compiler/backend/js/ast/JsParameter.java b/js/js.dart-ast/src/com/google/dart/compiler/backend/js/ast/JsParameter.java
index 300ffd456fc..9c829a455f7 100644
--- a/js/js.dart-ast/src/com/google/dart/compiler/backend/js/ast/JsParameter.java
+++ b/js/js.dart-ast/src/com/google/dart/compiler/backend/js/ast/JsParameter.java
@@ -13,7 +13,6 @@ import org.jetbrains.annotations.NotNull;
 public final class JsParameter extends SourceInfoAwareJsNode implements HasName {
     @NotNull
     private final JsName name;
-    private boolean hasDefaultValue = false;
 
     public JsParameter(@NotNull JsName name) {
         this.name = name;
@@ -31,14 +30,6 @@ public final class JsParameter extends SourceInfoAwareJsNode implements HasName
         return name;
     }
 
-    public boolean hasDefaultValue() {
-        return hasDefaultValue;
-    }
-
-    public void setHasDefaultValue(boolean hasDefaultValue) {
-        this.hasDefaultValue = hasDefaultValue;
-    }
-
     @Override
     public void accept(JsVisitor v) {
         v.visitParameter(this);
@@ -53,8 +44,6 @@ public final class JsParameter extends SourceInfoAwareJsNode implements HasName
     @NotNull
     @Override
     public JsParameter deepCopy() {
-        JsParameter parameter = new JsParameter(name);
-        parameter.setHasDefaultValue(hasDefaultValue);
-        return parameter.withMetadataFrom(this);
+        return new JsParameter(name).withMetadataFrom(this);
     }
 }
diff --git a/js/js.inliner/src/org/jetbrains/k2js/inline/clean/removeDefaultInitializers.kt b/js/js.inliner/src/org/jetbrains/k2js/inline/clean/removeDefaultInitializers.kt
index ca5505b83dc..88358e83613 100644
--- a/js/js.inliner/src/org/jetbrains/k2js/inline/clean/removeDefaultInitializers.kt
+++ b/js/js.inliner/src/org/jetbrains/k2js/inline/clean/removeDefaultInitializers.kt
@@ -17,6 +17,7 @@
 package org.jetbrains.k2js.inline.clean
 
 import com.google.dart.compiler.backend.js.ast.*
+import com.google.dart.compiler.backend.js.ast.metadata.hasDefaultValue
 
 import org.jetbrains.k2js.inline.util.toIdentitySet
 import org.jetbrains.k2js.inline.util.zipWithDefault
@@ -117,7 +118,7 @@ private fun getDefaultParamsNames(
 
     val argsParams = args.zipWithDefault(params, Namer.UNDEFINED_EXPRESSION)
     val relevantParams = argsParams.stream()
-                                   .filter { it.second.hasDefaultValue() }
+                                   .filter { it.second.hasDefaultValue }
                                    .filter { initialized == !isUndefined(it.first) }
 
     val names = relevantParams.map { it.second.getName() }
diff --git a/js/js.translator/src/org/jetbrains/k2js/translate/expression/FunctionTranslator.java b/js/js.translator/src/org/jetbrains/k2js/translate/expression/FunctionTranslator.java
index e6285662ad8..d757a56e6f8 100644
--- a/js/js.translator/src/org/jetbrains/k2js/translate/expression/FunctionTranslator.java
+++ b/js/js.translator/src/org/jetbrains/k2js/translate/expression/FunctionTranslator.java
@@ -17,10 +17,8 @@
 package org.jetbrains.k2js.translate.expression;
 
 
-import com.google.dart.compiler.backend.js.ast.JsFunction;
-import com.google.dart.compiler.backend.js.ast.JsName;
-import com.google.dart.compiler.backend.js.ast.JsParameter;
-import com.google.dart.compiler.backend.js.ast.JsPropertyInitializer;
+import com.google.dart.compiler.backend.js.ast.*;
+import com.google.dart.compiler.backend.js.ast.metadata.MetadataPackage;
 import com.intellij.util.SmartList;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -131,7 +129,7 @@ public final class FunctionTranslator extends AbstractTranslator {
     public static void addParameters(List<JsParameter> list, FunctionDescriptor descriptor, TranslationContext context) {
         for (ValueParameterDescriptor valueParameter : descriptor.getValueParameters()) {
             JsParameter jsParameter = new JsParameter(context.getNameForDescriptor(valueParameter));
-            jsParameter.setHasDefaultValue(valueParameter.hasDefaultValue());
+            MetadataPackage.setHasDefaultValue(jsParameter, valueParameter.hasDefaultValue());
             list.add(jsParameter);
         }
     }