--- a/js/src/jsobj.cpp
+++ b/js/src/jsobj.cpp
@@ -3266,19 +3266,16 @@ js::GetThisValue(JSObject* obj)
     }
 
     if (obj->is<ModuleEnvironmentObject>())
         return UndefinedValue();
 
     if (obj->is<WithEnvironmentObject>())
         return ObjectValue(*obj->as<WithEnvironmentObject>().withThis());
 
-    if (obj->is<NonSyntacticVariablesObject>())
-        return GetThisValue(obj->enclosingEnvironment());
-
     return ObjectValue(*obj);
 }
 
 class GetObjectSlotNameFunctor : public JS::CallbackTracer::ContextFunctor
 {
     JSObject* obj;
 
   public: