diff -up ykpers-1.6.0/ykpers-args.c.getopt ykpers-1.6.0/ykpers-args.c
--- ykpers-1.6.0/ykpers-args.c.getopt	2011-07-21 11:24:59.516717544 +0200
+++ ykpers-1.6.0/ykpers-args.c	2011-07-21 11:25:10.343550972 +0200
@@ -197,7 +197,7 @@ int args_to_config(int argc, char **argv
 		   bool *aesviahash,
 		   int *exit_code)
 {
-	char c;
+	int c;
 	const char *aeshash = NULL;
 	bool new_access_code = false;
 	bool slot_chosen = false;