diff --git a/aegisub/src/subs_edit_box.cpp b/aegisub/src/subs_edit_box.cpp
index 23c28ca32..2743dd0b0 100644
--- a/aegisub/src/subs_edit_box.cpp
+++ b/aegisub/src/subs_edit_box.cpp
@@ -912,6 +912,10 @@ void SubsEditBox::Commit(bool stay) {
 
 	// Update file
 	if (!updated && textNeedsCommit) {
+		if (StartTime->HasBeenModified() || EndTime->HasBeenModified()) {
+			StartTime->Update();
+			EndTime->Update();
+		}
 		grid->ass->FlagAsModified(_("editing"));
 		grid->CommitChanges();
 	}