Index: main/manager.c
===================================================================
--- main/manager.c	(revision 139381)
+++ main/manager.c	(working copy)
@@ -2337,7 +2337,7 @@
 	int format = AST_FORMAT_SLINEAR;
 
 	pthread_t th;
-	if (!name) {
+	if (ast_strlen_zero(name)) {
 		astman_send_error(s, m, "Channel not specified");
 		return 0;
 	}