Index: channels/chan_agent.c
===================================================================
--- channels/chan_agent.c	(revision 168609)
+++ channels/chan_agent.c	(working copy)
@@ -307,7 +307,7 @@
 
 	AST_LIST_TRAVERSE(&agents, p, list) {
 		ast_mutex_lock(&p->lock);
-		if (p->chan) {
+		if (p->chan && !ast_strlen_zero(p->loginchan)) {
 			ast_copy_string(basename, p->chan->name, sizeof(basename));
 			if ((tmp = strrchr(basename, '-'))) {
 				*tmp = '\0';