diff --git a/js/src/jscntxt.cpp b/js/src/jscntxt.cpp
index caa8c78609d2..09334ac512e9 100644
--- a/js/src/jscntxt.cpp
+++ b/js/src/jscntxt.cpp
@@ -582,6 +582,7 @@ js_DestroyContext(JSContext *cx, JSDestroyContextMode mode)
     JSContextCallback cxCallback;
     JSBool last;
 
+    rt = cx->runtime;
 #ifdef JS_THREADSAFE
     /*
      * For API compatibility we allow to destroy contexts without a thread in
@@ -591,10 +592,9 @@ js_DestroyContext(JSContext *cx, JSDestroyContextMode mode)
     JS_ASSERT(cx->thread && CURRENT_THREAD_IS_ME(cx->thread));
     if (!cx->thread)
         JS_SetContextThread(cx);
-#endif
-    rt = cx->runtime;
 
     JS_ASSERT_IF(rt->gcRunning, cx->outstandingRequests == 0);
+#endif
 
     if (mode != JSDCM_NEW_FAILED) {
         cxCallback = rt->cxCallback;