--- a/src/game/game.h
+++ b/src/game/game.h
@@ -2,7 +2,6 @@
 #include "includes.h"
 
 extern Uint32 average_loop_time;
-extern Uint32 game_start_time;
 extern Uint32 total_play_time, total_frames_drawn;
 extern float average_session_fps, current_fps;