diff --git a/ecmascript/compiler/builtins/builtins_object_stub_builder.cpp b/ecmascript/compiler/builtins/builtins_object_stub_builder.cpp
index 9122178789977ad86e3725624e54629e96fde6d5..fca3fbe8523e2f01c9525b31bceeb050f835e429 100644
--- a/ecmascript/compiler/builtins/builtins_object_stub_builder.cpp
+++ b/ecmascript/compiler/builtins/builtins_object_stub_builder.cpp
@@ -175,7 +175,7 @@ void BuiltinsObjectStubBuilder::AssignEnumElementProperty(Variable *result, Labe
                     Bind(&notHole);
                     {
                         // value
-                        FastSetPropertyByIndex(glue_, toAssign, *idx, value);
+                        FastSetPropertyByIndex(glue_, toAssign, TaggedGetInt(key), value);
                         Label exception(env);
                         BRANCH(HasPendingException(glue_), &exception, &loopEnd);
                         Bind(&exception);
diff --git a/test/moduletest/obj_dictionarymode/obj_dictionarymode.js b/test/moduletest/obj_dictionarymode/obj_dictionarymode.js
index 323c7f0da410c16fea320cbde682c1e132346b56..868a69d5ba60f0c41a3809ba8b8031e38d7e1fc6 100644
--- a/test/moduletest/obj_dictionarymode/obj_dictionarymode.js
+++ b/test/moduletest/obj_dictionarymode/obj_dictionarymode.js
@@ -166,4 +166,9 @@
     delete arrayLike[1];
     assert_equal(ArkTools.hasFastProperties(arrayLike), false);
 }
+
+{
+    let obj = Object.assign({ "11785313": "spt", "35961926": "xel" }, { "139": "sl", "11420": "ls" });
+    assert_equal(JSON.stringify(obj), '{"139":"sl","11420":"ls","11785313":"spt","35961926":"xel"}');
+}
 test_end();
\ No newline at end of file