diff --git a/editions/tw5.com/tiddlers/system/wikitext-macros.tid b/editions/tw5.com/tiddlers/system/wikitext-macros.tid
index c609205ab..5b9c190be 100644
--- a/editions/tw5.com/tiddlers/system/wikitext-macros.tid
+++ b/editions/tw5.com/tiddlers/system/wikitext-macros.tid
@@ -14,7 +14,9 @@ $src$
 
 That renders as:
 
+$$$text/vnd.tiddlywiki
 $src$
+$$$
 
 ... and the underlying HTML is:
 
@@ -35,7 +37,9 @@ $src$
 
 That renders as:
 
+$$$text/vnd.tiddlywiki
 $src$
+$$$
 </div>
 \end