--- src/Attack.cxx 
+++ src/Attack.cxx 
@@ -83,6 +83,7 @@
   int height = -1, width = -1;
   
   player_name[0] = '\0';
+  glutInit(&argc, argv);
   parseCommandLine(argc, argv, mode, port, host_name, player_name, height, width);
   run_crack_attack(mode, port, host_name, player_name, height, width);