diff --git a/dom/ipc/TabParent.cpp b/dom/ipc/TabParent.cpp
index a6d56d0396b8..d989c614acb1 100644
--- a/dom/ipc/TabParent.cpp
+++ b/dom/ipc/TabParent.cpp
@@ -1097,7 +1097,7 @@ TabParent::ReceiveMessage(const nsString& aMessage,
   if (frameLoader && frameLoader->GetFrameMessageManager()) {
     nsRefPtr<nsFrameMessageManager> manager =
       frameLoader->GetFrameMessageManager();
-    JSContext* ctx = manager->GetJSContext();
+    AutoPushJSContext ctx(manager->GetJSContext());
     JSAutoRequest ar(ctx);
     uint32_t len = 0; //TODO: obtain a real value in bug 572685
     // Because we want JS messages to have always the same properties,