diff --git a/site_ansto/instrument/config/environment/temperature/lakeshore340_common.tcl b/site_ansto/instrument/config/environment/temperature/lakeshore340_common.tcl
index 999a155c..c48075dd 100644
--- a/site_ansto/instrument/config/environment/temperature/lakeshore340_common.tcl
+++ b/site_ansto/instrument/config/environment/temperature/lakeshore340_common.tcl
@@ -31,9 +31,9 @@ proc ::environment::temperature::mkls340sim {temp_sobj} {
 # @param IP, (optional) IP address for temperature controller.
 # @param port, (optional) port number for temperature controller.
 proc ::environment::temperature::mkls340 {temp_sobj IP port} {
-  Makeasyncqueue sertemp1 LS340 $IP $port
-  sertemp1 timeout 2000
-  EvFactory new $temp_sobj ls340 sertemp1 1 D ABCD
+  Makeasyncqueue ${temp_sobj}_AsyncQ LS340 $IP $port
+  ${temp_sobj}_AsyncQ timeout 2000
+  EvFactory new $temp_sobj ls340 ${temp_sobj}_AsyncQ 1 D ABCD
   sicslist setatt $temp_sobj units kelvin
   sicslist setatt $temp_sobj klass @none
 }