diff --git a/src/noggit/ui/Water.h b/src/noggit/ui/Water.h
index da246902..0971e9fd 100755
--- a/src/noggit/ui/Water.h
+++ b/src/noggit/ui/Water.h
@@ -14,6 +14,8 @@ class QPushButton;
 class QSpinBox;
 class World;
 class QComboBox;
+class QRadioButton;
+class QButtonGroup;
 
 namespace Noggit
 {