1 files changed, 2 insertions, 0 deletions
diff --git a/netslide.c b/netslide.c
index b72706a..6bac447 100644
--- a/netslide.c
+++ b/netslide.c
@@ -1006,6 +1006,8 @@ static game_state *make_move(game_state *state, game_ui *ui,
     int n, dx, dy;
     game_state *ret;
 
+    button &= ~MOD_MASK;
+
     if (button != LEFT_BUTTON && button != RIGHT_BUTTON)
         return NULL;