1 files changed, 6 insertions, 0 deletions
diff --git a/cube.c b/cube.c
index 0ff952f..ffefa2f 100644
--- a/cube.c
+++ b/cube.c
@@ -1003,6 +1003,11 @@ static void free_ui(game_ui *ui)
 {
 }
 
+static void game_changed_state(game_ui *ui, game_state *oldstate,
+                               game_state *newstate)
+{
+}
+
 struct game_drawstate {
     int ox, oy;                        /* pixel position of float origin */
 };
@@ -1637,6 +1642,7 @@ const struct game thegame = {
     FALSE, game_text_format,
     new_ui,
     free_ui,
+    game_changed_state,
     make_move,
     game_size,
     game_colours,