diff --git a/site_ansto/site_ansto.c b/site_ansto/site_ansto.c
index c020047d..07336634 100644
--- a/site_ansto/site_ansto.c
+++ b/site_ansto/site_ansto.c
@@ -200,6 +200,7 @@ static pEVControl InstallEnvironmentController(SicsInterp *pSics,
     if(pDriv){
       pNew = CreateEVController(pDriv,argv[2],&status);
       if(pNew != NULL){
+        NHQ200Register(pNew, pDriv);
         AddCommand(pSics,argv[2],NHQ200Wrapper,DeleteEVController,
                    pNew);
       }