X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/c0f63b88e536d161a4508c918f805fbc497b75c9..e1a7869e0eff2a80f58c3c77c4ab072b0df18118:/lightup.c

diff --git a/lightup.c b/lightup.c
index 8f09263..5beacc7 100644
--- a/lightup.c
+++ b/lightup.c
@@ -1871,7 +1871,7 @@ struct game_drawstate {
             (pc)) -1 (nil)
         (nil))
  */
-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)
 {
     enum { NONE, FLIP_LIGHT, FLIP_IMPOSSIBLE } action = NONE;