diff --git a/Aircraft/c172p/c172p-set.xml b/Aircraft/c172p/c172p-set.xml
index 074307cd8..88621ed1c 100644
--- a/Aircraft/c172p/c172p-set.xml
+++ b/Aircraft/c172p/c172p-set.xml
@@ -184,6 +184,7 @@ Started October 23 2001 by John Check, fgpanels@rockfish.net
       <file>Aircraft/c172p/Nasal/ki266.nas</file>
       <script><![CDATA[
         ki266.new(0);
+        aircraft.data.add( "engines/engine[0]/egt-bug-norm" );
       ]]></script>
     </c172p>