diff --git a/src/gui/widget.hpp b/src/gui/widget.hpp
index dfbe174f1..a161cb602 100644
--- a/src/gui/widget.hpp
+++ b/src/gui/widget.hpp
@@ -32,6 +32,8 @@ using namespace gui;
 namespace GUIEngine
 {
     
+    class RibbonGridWidget;
+    
     enum WidgetType
     {
         WTYPE_NONE = -1,