diff --git a/src/edit.c b/src/edit.c
index 070d84c..4f8e374 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -1057,6 +1057,9 @@
 	case K_CURSORHOLD:	// Didn't type something for a while.
 	    ins_apply_autocmds(EVENT_CURSORHOLDI);
 	    did_cursorhold = TRUE;
+	    // If CTRL-G U was used apply it to the next typed key.
+	    if (dont_sync_undo == TRUE)
+		dont_sync_undo = MAYBE;
 	    break;
 
 #ifdef FEAT_GUI_MSWIN