diff --git a/editions/tw5.com/tiddlers/features/Performance Instrumentation.tid b/editions/tw5.com/tiddlers/features/Performance Instrumentation.tid
index 270e8bf7d..702782883 100644
--- a/editions/tw5.com/tiddlers/features/Performance Instrumentation.tid	
+++ b/editions/tw5.com/tiddlers/features/Performance Instrumentation.tid	
@@ -25,7 +25,7 @@ As an example, try switching between the sidebar tabs to compare how long they t
 More detailed information on filter execution timings is also available. With performance instrumentation enabled, ype the following JavaScript command in the browser developer console:
 
 ```
-tw.perf.log()
+$tw.perf.log()
 ```
 
 A table is displayed with the following information: