diff --git a/projects/mtg/include/GameOptions.h b/projects/mtg/include/GameOptions.h
index cddbf3c33..88f1cbb4e 100644
--- a/projects/mtg/include/GameOptions.h
+++ b/projects/mtg/include/GameOptions.h
@@ -21,6 +21,8 @@ using std::string;
 class WStyle;
 class StyleManager;
 class Player;
+class GameApp;
+
 
 class Options {
 public: