diff --git a/site_ansto/instrument/config/environment/omron_hldc.sct b/site_ansto/instrument/config/environment/omron_hldc.sct
index 3331b342..b14693b6 100644
--- a/site_ansto/instrument/config/environment/omron_hldc.sct
+++ b/site_ansto/instrument/config/environment/omron_hldc.sct
@@ -2,7 +2,7 @@
 # vim: ts=8 sts=2 sw=2 expandtab autoindent smartindent
 #
 driver omron_hldc = {
-  vendor = Omron; device = 'ZS-HDLC'; protocol = std;
+  vendor = Omron; device = 'ZS-HDLC'; protocol = omron_ap;
   class = environment;
   simulation_group = environment_simulation;