diff --git a/src/ui.c b/src/ui.c
index 2d33f7b..cde97c3 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -532,6 +532,9 @@
     void
 ui_delay(long msec, int ignoreinput)
 {
+#ifdef FEAT_JOB_CHANNEL
+    ch_log(NULL, "ui_delay(%ld)", msec);
+#endif
 #ifdef FEAT_GUI
     if (gui.in_use && !ignoreinput)
 	gui_wait_for_chars(msec, typebuf.tb_change_cnt);