diff --git a/mozilla/js/src/xpconnect/src/xpcstack.cpp b/mozilla/js/src/xpconnect/src/xpcstack.cpp
index bef67b54dd6..9a9fc09c42d 100644
--- a/mozilla/js/src/xpconnect/src/xpcstack.cpp
+++ b/mozilla/js/src/xpconnect/src/xpcstack.cpp
@@ -143,9 +143,10 @@ XPCJSStackFrame::CreateStack(JSContext* cx, JSStackFrame* fp,
 
         if(!failed)
         {
-            self->mLanguage = JS_IsNativeFrame(cx, fp) ?
-                                nsIProgrammingLanguage::CPLUSPLUS :
-                                nsIProgrammingLanguage::JAVASCRIPT;
+            if (JS_IsNativeFrame(cx, fp))
+                self->mLanguage = nsIProgrammingLanguage::CPLUSPLUS;
+            else
+                self->mLanguage = nsIProgrammingLanguage::JAVASCRIPT;
             if(self->IsJSFrame())
             {
                 JSScript* script = JS_GetFrameScript(cx, fp);