diff --git a/site_ansto/instrument/config/environment/protekmm.sct b/site_ansto/instrument/config/environment/protekmm.sct
index e8316a8e..68924230 100644
--- a/site_ansto/instrument/config/environment/protekmm.sct
+++ b/site_ansto/instrument/config/environment/protekmm.sct
@@ -1,6 +1,7 @@
 # vim: ts=8 sts=2 sw=2 expandtab autoindent smartindent nocindent
 driver protekmm = {
   protocol = protek608
+  sobj_priv_type = 'user float'
   class = environment
   simulation_group = environment_simulation
   code mkDriver = {%%
diff --git a/site_ansto/instrument/config/environment/sct_protek_common.tcl b/site_ansto/instrument/config/environment/sct_protek_common.tcl
index 7558835d..04621577 100644
--- a/site_ansto/instrument/config/environment/sct_protek_common.tcl
+++ b/site_ansto/instrument/config/environment/sct_protek_common.tcl
@@ -129,7 +129,6 @@ proc MakeProtek {name sctName {scale 1.0} {offset 0.0} {interval 0.5} {cbFunc "r
     set soState "so_state_$name"
     clientput "MakeSICSObj $sobjName SCT_OBJECT"
     MakeSICSObj $soState SCT_OBJECT
-    MakeSICSObj $sobjName SCT_OBJECT user float
     sicslist setatt $sobjName long_name $sobjName
 
     hfactory /sics/$soState/state plain user text
diff --git a/site_ansto/instrument/config/environment/sct_protekmm.tcl b/site_ansto/instrument/config/environment/sct_protekmm.tcl
index f473265d..b7acc976 100644
--- a/site_ansto/instrument/config/environment/sct_protekmm.tcl
+++ b/site_ansto/instrument/config/environment/sct_protekmm.tcl
@@ -32,7 +32,7 @@ proc ::scobj::protekmm::mkDriver { sct_controller name } {
   set ns "[namespace current]"
   set catch_status [ catch {
 
-    MakeSICSObj ${name} SCT_OBJECT
+    MakeSICSObj ${name} SCT_OBJECT user float
 
     sicslist setatt ${name} klass environment
     sicslist setatt ${name} long_name ${name}
diff --git a/site_ansto/instrument/util/gen_sct.py b/site_ansto/instrument/util/gen_sct.py
index 162c5caf..87d168ca 100755
--- a/site_ansto/instrument/util/gen_sct.py
+++ b/site_ansto/instrument/util/gen_sct.py
@@ -86,6 +86,7 @@ reserved = {
     'CODE' : 'CODE',
     'ADD_ARGS' : 'ADD_ARGS',
     'MAKE_ARGS' : 'MAKE_ARGS',
+    'SOBJ_PRIV_TYPE' : 'SOBJ_PRIV_TYPE',
     'PROTOCOL_ARGS' : 'PROTOCOL_ARGS',
 # Group keywords
     'GROUP' : 'GROUP',
@@ -314,6 +315,7 @@ def p_driver_assignment(p):
                       | SIMULATION_GROUP EQUALS id_or_str
                       | ADD_ARGS EQUALS text_string
                       | MAKE_ARGS EQUALS text_string
+                      | SOBJ_PRIV_TYPE EQUALS text_string
                       | PROTOCOL_ARGS EQUALS text_string
                       | DEBUG_THRESHOLD EQUALS value
     '''
@@ -1313,7 +1315,12 @@ def put_mkDriver(MyDriver):
         else:
             txt += ['    set permlink_device_number [format "%02d" [incr ::scobj::permlink_device_counter]]']
             txt += ['']
-    txt += ['    MakeSICSObj ${name} SCT_OBJECT']
+    if 'sobj_priv_type' in MyDriver:
+        priv_type = MyDriver['sobj_priv_type'].split()
+        ms_line = '    MakeSICSObj ${name} SCT_OBJECT %s %s' % (priv_type[0], priv_type[1])
+    else:
+        ms_line = '    MakeSICSObj ${name} SCT_OBJECT'
+    txt += [ms_line]
     txt += ['']
     txt += ['    sicslist setatt ${name} klass %s' % MyDriver['class']]
     txt += ['    sicslist setatt ${name} long_name ${name}']