diff --git a/OpenHPL/Interfaces/TurbineContacts.mo b/OpenHPL/Interfaces/TurbineContacts.mo
index 9284d93..32cb18b 100644
--- a/OpenHPL/Interfaces/TurbineContacts.mo
+++ b/OpenHPL/Interfaces/TurbineContacts.mo
@@ -1,6 +1,5 @@
 within OpenHPL.Interfaces;
 partial model TurbineContacts "Model of turbine connectors"
-  extends Interfaces.ContactPort;
   parameter Boolean enable_P_out = false "If checked, get a connector for the output power"
     annotation (choices(checkBox = true), Dialog(group="Outputs",tab="I/O"));
   input Modelica.Blocks.Interfaces.RealInput u_t "[Guide vane|nozzle] opening of the turbine(=1: completely open, =0: completely closed)"