diff --git a/src/objects.cc b/src/objects.cc
index b95787fe16..07ad6f1476 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -2161,17 +2161,6 @@ void JSObject::MigrateFastToFast(Handle<JSObject> object, Handle<Map> new_map) {
 }
 
 
-void JSObject::GeneralizeFieldRepresentation(Handle<JSObject> object,
-                                             int modify_index,
-                                             Representation new_representation,
-                                             Handle<HeapType> new_field_type) {
-  Handle<Map> new_map = Map::GeneralizeRepresentation(
-      handle(object->map()), modify_index, new_representation, new_field_type,
-      FORCE_FIELD);
-  MigrateToMap(object, new_map);
-}
-
-
 int Map::NumberOfFields() {
   DescriptorArray* descriptors = instance_descriptors();
   int result = 0;
diff --git a/src/objects.h b/src/objects.h
index 603f7b3e3f..41beca4d8a 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2236,11 +2236,6 @@ class JSObject: public JSReceiver {
                                 Handle<Map> new_map,
                                 int expected_additional_properties);
 
-  static void GeneralizeFieldRepresentation(Handle<JSObject> object,
-                                            int modify_index,
-                                            Representation new_representation,
-                                            Handle<HeapType> new_field_type);
-
   static void UpdateAllocationSite(Handle<JSObject> object,
                                    ElementsKind to_kind);