diff --git a/js/xpconnect/src/XPCWrappedNative.cpp b/js/xpconnect/src/XPCWrappedNative.cpp
index 5bbcee0ceb1b..714343db1d82 100644
--- a/js/xpconnect/src/XPCWrappedNative.cpp
+++ b/js/xpconnect/src/XPCWrappedNative.cpp
@@ -1356,9 +1356,6 @@ bool
 XPCWrappedNative::CallMethod(XPCCallContext& ccx,
                              CallMode mode /*= CALL_METHOD */)
 {
-    MOZ_ASSERT(ccx.GetXPCContext()->CallerTypeIsJavaScript(),
-               "Native caller for XPCWrappedNative::CallMethod?");
-
     nsresult rv = ccx.CanCallNow();
     if (NS_FAILED(rv)) {
         return Throw(rv, ccx);
diff --git a/js/xpconnect/src/xpcprivate.h b/js/xpconnect/src/xpcprivate.h
index 538995650cd4..ccc4f0b8f409 100644
--- a/js/xpconnect/src/xpcprivate.h
+++ b/js/xpconnect/src/xpcprivate.h
@@ -683,10 +683,6 @@ public:
             mCallingLangType = lt;
             return tmp;
         }
-    bool CallerTypeIsJavaScript() const
-        {
-            return LANG_JS == mCallingLangType;
-        }
     nsresult GetException(nsIException** e)
         {
             nsCOMPtr<nsIException> rval = mException;