diff --git a/panda/src/tform/mouseWatcherRegion.h b/panda/src/tform/mouseWatcherRegion.h
index 9bf29b7154..09d12bf1b0 100644
--- a/panda/src/tform/mouseWatcherRegion.h
+++ b/panda/src/tform/mouseWatcherRegion.h
@@ -89,7 +89,6 @@ private:
     F_keyboard       = 0x200,
   };
   int _flags;
-  ModifierButtons _mods;
 
 public:
   static TypeHandle get_class_type() {