diff -p -up trickle-1.07/tricklectl.c~ trickle-1.07/tricklectl.c
--- trickle-1.07/tricklectl.c~	2004-12-13 00:50:10.000000000 +0100
+++ trickle-1.07/tricklectl.c	2009-08-09 12:51:29.000000000 +0200
@@ -91,7 +91,7 @@ main(int argc, char **argv)
 	trickled_ctl_open(&trickled_sock);
 
 	if (!trickled_sock)
-		err(1, sockname);
+		err(1, "%s", sockname);
 
 	handle_command(i, argc, argv);