diff --git a/filling.c b/filling.c
index 6f6c6c3..1ce04eb 100644
--- a/filling.c
+++ b/filling.c
@@ -1524,7 +1524,7 @@ const struct game thegame = {
     TRUE, FALSE, game_print_size, game_print,
     FALSE,				   /* wants_statusbar */
     FALSE, game_timing_state,
-    0,					   /* flags */
+    REQUIRE_NUMPAD,		       /* flags */
 };
 
 #ifdef STANDALONE_SOLVER /* solver? hah! */