diff --git a/dlls/jscript/object.c b/dlls/jscript/object.c
index 123541eae60..58db45b8611 100644
--- a/dlls/jscript/object.c
+++ b/dlls/jscript/object.c
@@ -500,6 +500,8 @@ static HRESULT Object_defineProperty(script_ctx_t *ctx, vdisp_t *jsthis, WORD fl
 
     hres = jsdisp_define_property(obj, name, &prop_desc);
     release_property_descriptor(&prop_desc);
+    if(SUCCEEDED(hres) && r)
+        *r = jsval_obj(jsdisp_addref(obj));
     return hres;
 }
 
diff --git a/dlls/mshtml/tests/es5.js b/dlls/mshtml/tests/es5.js
index 11b68e5953f..7ee8cc1e03b 100644
--- a/dlls/mshtml/tests/es5.js
+++ b/dlls/mshtml/tests/es5.js
@@ -311,8 +311,9 @@ function test_defineProperty() {
         ok(false, "expected exception");
     }
 
-    var obj = new Object();
-    Object.defineProperty(obj, "test", {});
+    var obj = new Object(), defined;
+    defined = Object.defineProperty(obj, "test", {});
+    ok(defined === obj, "defined != obj");
     ok("test" in obj, "test is not in obj");
     test_own_data_prop_desc(obj, "test", false, false, false);
     ok(obj.test === undefined, "obj.test = " + obj.test);