Index: src/conf_hid.c
===================================================================
--- src/conf_hid.c	(revision 21057)
+++ src/conf_hid.c	(revision 21058)
@@ -48,7 +48,7 @@
 	{
 		htpp_entry_t *e;
 		for(e = htpp_first(conf_hid_ids); e != NULL; e = htpp_next(conf_hid_ids, e))
-			fprintf(stderr, "ERROR: conf_hid id left registered: '%s'\n", e->key);
+			fprintf(stderr, "ERROR: conf_hid id left registered: '%s'\n", (char *)e->key);
 	}
 #endif