--- a/dom/events/TouchEvent.cpp
+++ b/dom/events/TouchEvent.cpp
@@ -189,17 +189,16 @@ TouchEvent::PrefEnabled(JSContext* aCx, 
       static bool sIsTouchDeviceSupportPresent = false;
       // On Windows and GTK3 we auto-detect based on device support.
       if (!sDidCheckTouchDeviceSupport) {
         sDidCheckTouchDeviceSupport = true;
         sIsTouchDeviceSupportPresent = WidgetUtils::IsTouchDeviceSupportPresent();
       }
       prefValue = sIsTouchDeviceSupportPresent;
 #else
-      NS_WARNING("dom.w3c_touch_events.enabled=2 not implemented!");
       prefValue = false;
 #endif
     } else {
       prefValue = !!flag;
     }
   }
   if (prefValue) {
     nsContentUtils::InitializeTouchEventTable();