--- vconfig.c	2005-07-29 19:38:42.000000000 +0200
+++ vconfig.c.oden	2008-12-23 15:41:08.000000000 +0100
@@ -63,7 +63,7 @@ static char* usage = 
 "            is OFF.\n";
 
 void show_usage() {
-   fprintf(stdout,usage);
+   fprintf(stdout, "%s", usage);
 }
 
 int hex_to_bytes(char* bytes, int bytes_length, char* hex_str) {