diff -up ykpers-1.4.1/ykpersonalize.c.getopt ykpers-1.4.1/ykpersonalize.c
--- ykpers-1.4.1/ykpersonalize.c.getopt	2011-04-29 16:05:30.000000000 +0200
+++ ykpers-1.4.1/ykpersonalize.c	2011-04-29 16:05:45.000000000 +0200
@@ -205,7 +205,7 @@ 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;