diff --git a/core/emperor.c b/core/emperor.c
index ccbd536e..dfcfcb31 100644
--- a/core/emperor.c
+++ b/core/emperor.c
@@ -1887,6 +1887,8 @@ recheck:
 				// back to on_demand mode ...
 				else if (ui_current->status == 2) {
 					event_queue_add_fd_read(uwsgi.emperor_queue, ui_current->on_demand_fd);
+					close(ui_current->pipe[0]);
+        				if (ui_current->use_config) close(ui_current->pipe_config[0]);
 					ui_current->pid = -1;
 					ui_current->status = 0;
 					ui_current->cursed_at = 0;