diff --git a/module-types/Diamond SA/Kompaktmodul-Simplex-12-ports-E-2000.yml b/module-types/Diamond SA/Kompaktmodul-Simplex-12-ports-E-2000.yml
index a4e1fc5977..7e67c6da14 100644
--- a/module-types/Diamond SA/Kompaktmodul-Simplex-12-ports-E-2000.yml	
+++ b/module-types/Diamond SA/Kompaktmodul-Simplex-12-ports-E-2000.yml	
@@ -47,7 +47,7 @@ front-ports:
   - name: Port 11
     type: lc
     rear_port: '{module}1-12'
-    rear_port_position: 12
+    rear_port_position: 11
   - name: Port 12
     type: lc
     rear_port: '{module}1-12'