diff --git a/site_ansto/anstoutil.h b/site_ansto/anstoutil.h
index 95575b63..ddb5fef7 100644
--- a/site_ansto/anstoutil.h
+++ b/site_ansto/anstoutil.h
@@ -7,4 +7,5 @@
 #define SUCCESS 1
 /*@observer@*/ char *getParam(/*@dependent@*/SConnection *pCon, Tcl_Interp *pTcl, char *params, char *parName, int mustHave ); 
 int portNumCmd(/*@dependent@*/SConnection *pCon, SicsInterp *pInter, void *pData, int argc, char *argv[]);
+int getPortNum(SConnection *pCon, char *portName);
 #endif