diff --git a/TraxSource/UIMain/OptionsPanel.h b/TraxSource/UIMain/OptionsPanel.h
index 841a71c..6bd7eda 100644
--- a/TraxSource/UIMain/OptionsPanel.h
+++ b/TraxSource/UIMain/OptionsPanel.h
@@ -15,6 +15,7 @@
 #include "Panel.h"
 #endif
 
+class BButton;
 class BCheckBox ;
 class BarberPole ;
 class ColouredView ;