diff --git a/cfg/Normen.cfg b/cfg/Normen.cfg
index b92ebeb..82b48a3 100644
--- a/cfg/Normen.cfg
+++ b/cfg/Normen.cfg
@@ -3,7 +3,6 @@ ISO 13715
 			
 [Oberflaechennorm]
 ISO 1302:2002	
-ISO 21920	
 
 [Massnorm]	
 ISO 14405