diff --git a/site_ansto/instrument/config/environment/isotech_ps.sct b/site_ansto/instrument/config/environment/isotech_ps.sct
index 585a29d4..b50e60e7 100644
--- a/site_ansto/instrument/config/environment/isotech_ps.sct
+++ b/site_ansto/instrument/config/environment/isotech_ps.sct
@@ -5,7 +5,7 @@ driver isotech_ps = {
   vendor = isotech; device = ps; protocol = std;
   class = environment;
   simulation_group = environment_simulation;
-  protocol_args = '"\r"';
+  protocol_args = '{terminator "\r"}';
   group = {
     readable = 5
     mutable = true
diff --git a/site_ansto/instrument/config/environment/temperature/julabo_lh45.sct b/site_ansto/instrument/config/environment/temperature/julabo_lh45.sct
index 20b2f7e3..06661609 100644
--- a/site_ansto/instrument/config/environment/temperature/julabo_lh45.sct
+++ b/site_ansto/instrument/config/environment/temperature/julabo_lh45.sct
@@ -8,7 +8,7 @@ driver julabo_lh45_gen = {
   simulation_group = environment_simulation
   add_args = '{id 1} {ctrl_sensor "bath"} {tol 5.0}';
   make_args = 'id ctrl_sensor tol';
-  protocol_args = '"\r"';
+  protocol_args = '{terminator "\r"}';
 #
 # Unnamed group has variables at device level
 #