1 files changed, 1 insertions, 1 deletions
diff --git a/lightup.c b/lightup.c
index 4dd46c8..a56f3a9 100644
--- a/lightup.c
+++ b/lightup.c
@@ -1882,7 +1882,7 @@ static char *interpret_move(const game_state *state, game_ui *ui,
     enum { NONE, FLIP_LIGHT, FLIP_IMPOSSIBLE } action = NONE;
     int cx = -1, cy = -1;
     unsigned int flags;
-    char buf[80], *nullret = NULL, *empty = "", c;
+    char buf[80], *nullret = UI_UPDATE, *empty = UI_UPDATE, c;
 
     if (button == LEFT_BUTTON || button == RIGHT_BUTTON) {
         if (ui->cur_visible)