diff --git a/Aircraft/c172p/Models/Immat/immat.xml b/Aircraft/c172p/Models/Immat/immat.xml
index cb181d3fe..e868f8406 100644
--- a/Aircraft/c172p/Models/Immat/immat.xml
+++ b/Aircraft/c172p/Models/Immat/immat.xml
@@ -1,4 +1,4 @@
-<?xml version="1.0"?>
+<?xml version="1.0" encoding="ISO-8859-1"?>
 
 <PropertyList>