Index: apps/app_mixmonitor.c
===================================================================
--- apps/app_mixmonitor.c       (revision 368394)
+++ apps/app_mixmonitor.c       (working copy)
@@ -1034,1 +1034,1 @@
        ast_channel_unlock(c);

        if (res) {
+               c = ast_channel_unref(c);
                astman_send_error(s, m, "Could not start monitoring channel");
                return AMI_SUCCESS;
        }