1 files changed, 1 insertions, 0 deletions
diff --git a/src/gui/button.h b/src/gui/button.h
index d8ed9fa7..1faf2455 100644
--- a/src/gui/button.h
+++ b/src/gui/button.h
@@ -71,6 +71,7 @@ class Button : public gcn::Button
 
         static ImageRect button[4];    /**< Button state graphics */
         static int mInstances;         /**< Number of button instances */
+        static float mAlpha;
         bool mIsLogged;                /**< Makes the button appear pressed all the time */
 };