--- a/mozilla-release/js/src/vm/Runtime.cpp
+++ b/mozilla-release/js/src/vm/Runtime.cpp
@@ -283,7 +283,7 @@
     PodZero(&atomState);
 
 #if JS_STACK_GROWTH_DIRECTION > 0
-    nativeStackLimit = UINTPTR_MAX;
+    mainThread.nativeStackLimit = UINTPTR_MAX;
 #endif
 }