--- a/js/src/jsfun.c
+++ b/js/src/jsfun.c
@@ -854,33 +854,31 @@ call_resolve(JSContext *cx, JSObject *ob
                                      getter, setter, attrs,
                                      SPROP_HAS_SHORTID, (int) slot, NULL)) {
             return JS_FALSE;
         }
         *objp = obj;
         return JS_TRUE;
     }
 
-    if (!(flags & JSRESOLVE_ASSIGNING)) {
-        /*
-         * Resolve arguments so that we never store a particular Call object's
-         * arguments object reference in a Call prototype's |arguments| slot.
-         */
-        atom = cx->runtime->atomState.argumentsAtom;
-        if (id == ATOM_KEY(atom)) {
-            if (!js_DefineNativeProperty(cx, obj,
-                                         ATOM_TO_JSID(atom), JSVAL_VOID,
-                                         NULL, NULL, JSPROP_PERMANENT,
-                                         SPROP_HAS_SHORTID, CALL_ARGUMENTS,
-                                         NULL)) {
-                return JS_FALSE;
-            }
-            *objp = obj;
-            return JS_TRUE;
+    /*
+     * Resolve arguments so that we never store a particular Call object's
+     * arguments object reference in a Call prototype's |arguments| slot.
+     */
+    atom = cx->runtime->atomState.argumentsAtom;
+    if (id == ATOM_KEY(atom)) {
+        if (!js_DefineNativeProperty(cx, obj,
+                                     ATOM_TO_JSID(atom), JSVAL_VOID,
+                                     NULL, NULL, JSPROP_PERMANENT,
+                                     SPROP_HAS_SHORTID, CALL_ARGUMENTS,
+                                     NULL)) {
+            return JS_FALSE;
         }
+        *objp = obj;
+        return JS_TRUE;
     }
     return JS_TRUE;
 }
 
 static JSBool
 call_convert(JSContext *cx, JSObject *obj, JSType type, jsval *vp)
 {
     JSStackFrame *fp;