1 files changed, 1 insertions, 1 deletions
diff --git a/nullgame.c b/nullgame.c
index 9e99109..5a0ba42 100644
--- a/nullgame.c
+++ b/nullgame.c
@@ -161,7 +161,7 @@ struct game_drawstate {
     int FIXME;
 };
 
-static char *interpret_move(game_state *state, game_ui *ui, game_drawstate *ds,
+static char *interpret_move(game_state *state, game_ui *ui, const game_drawstate *ds,
 			    int x, int y, int button)
 {
     return NULL;