diff -up allegro-4.2.3/tools/pack.c~ allegro-4.2.3/tools/pack.c --- allegro-4.2.3/tools/pack.c~ 2006-05-20 16:49:58.000000000 +0200 +++ allegro-4.2.3/tools/pack.c 2010-12-30 11:20:42.425231307 +0100 @@ -42,7 +42,7 @@ static void err(char *s1, char *s2) printf(": %s", s1); if (s2) - printf(s2); + printf("%s", s2); printf("\n");