diff --git a/editions/tw5.com/tiddlers/mechanisms/HistoryMechanism.tid b/editions/tw5.com/tiddlers/mechanisms/HistoryMechanism.tid
index 17d29e1ed1..14d7bd9871 100644
--- a/editions/tw5.com/tiddlers/mechanisms/HistoryMechanism.tid
+++ b/editions/tw5.com/tiddlers/mechanisms/HistoryMechanism.tid
@@ -1,5 +1,5 @@
 created: 20140213171818824
-modified: 20150516172236345
+modified: 20140516172236345
 tags: mechanism
 title: HistoryMechanism
 type: text/vnd.tiddlywiki