diff --git a/site_ansto/instrument/server_config.tcl b/site_ansto/instrument/server_config.tcl
index 5a1ae67d..6eb582fb 100644
--- a/site_ansto/instrument/server_config.tcl
+++ b/site_ansto/instrument/server_config.tcl
@@ -18,7 +18,7 @@ foreach {simflag         icsval    fakedev} {
   environment_simulation false     true 
   counter_simulation     false     false
   motor_simulation       false     false
-  chopper_simulation     false     true 
+  chopper_simulation     false     false 
   velsel_simulation      false     true 
   plc_simulation         false     true 
   rfgen_simulation       false     true