diff --git a/js/src/vm/Stack-inl.h b/js/src/vm/Stack-inl.h
index dd2a87d6844b..7304799f2022 100644
--- a/js/src/vm/Stack-inl.h
+++ b/js/src/vm/Stack-inl.h
@@ -531,6 +531,8 @@ ContextStack::currentScript(jsbytecode **ppc) const
     if (fp->beginsIonActivation()) {
         JSScript *script = NULL;
         ion::GetPcScript(cx_, &script, ppc);
+        if (script->compartment() != cx_->compartment)
+            return NULL;
         return script;
     }
 #endif