diff --git a/gamedata.cpp b/gamedata.cpp
index 6474bac..11adaa6 100644
--- a/gamedata.cpp
+++ b/gamedata.cpp
@@ -225,11 +225,17 @@ bool GameData::endgame()
     if (get_colour(PLAYER1_COLOUR).empty())
     {
 	player = WIN2;
+#ifdef DEBUG
+	fprintf(stderr, "debug: Gamedata::endgame(): player 2 wins\n");
+#endif
 	return true;
     }
     if (get_colour(PLAYER2_COLOUR).empty())
     {
 	player = WIN1;
+#ifdef DEBUG
+	fprintf(stderr, "debug: Gamedata::endgame(): player 1 wins\n");
+#endif
 	return true;
     }