diff --git a/js/src/gc/Root.h b/js/src/gc/Root.h
index b6b9b3592ec..c27ae3be373 100644
--- a/js/src/gc/Root.h
+++ b/js/src/gc/Root.h
@@ -383,6 +383,11 @@ public:
     }
 };
 
+#if defined(DEBUG) && defined(JS_GC_ZEAL) && defined(JSGC_ROOT_ANALYSIS) && !defined(JS_THREADSAFE)
+extern void
+CheckStackRoots(JSContext *cx);
+#endif
+
 /*
  * Hook for dynamic root analysis. Checks the native stack and poisons
  * references to GC things which have not been rooted.
@@ -392,7 +397,6 @@ inline void MaybeCheckStackRoots(JSContext *cx)
 #ifdef DEBUG
     JS_ASSERT(!IsRootingUnnecessaryForContext(cx));
 # if defined(JS_GC_ZEAL) && defined(JSGC_ROOT_ANALYSIS) && !defined(JS_THREADSAFE)
-    void CheckStackRoots(JSContext *cx);
     CheckStackRoots(cx);
 # endif
 #endif