diff -pdru ratpoison/src/hook.c ratpoison.build/src/hook.c
--- ratpoison/src/hook.c	2013-08-07 12:08:11.161005020 -0300
+++ ratpoison.build/src/hook.c	2013-08-07 13:18:16.804773548 -0300
@@ -34,7 +34,10 @@ hook_add (struct list_head *hook, struct
   list_for_each_entry (cur, hook, node)
     {
       if (!strcmp (sbuf_get (cur), sbuf_get (s)))
-        return;
+        {
+          sbuf_free (s);
+          return;
+        }
     }
 
   /* It's not in the list, so add it. */