diff --git a/site_ansto/instrument/util/mk_SICSmd5.sh b/site_ansto/instrument/util/mk_SICSmd5.sh
index e1407796..cfa897ff 100755
--- a/site_ansto/instrument/util/mk_SICSmd5.sh
+++ b/site_ansto/instrument/util/mk_SICSmd5.sh
@@ -5,8 +5,10 @@ then
   echo "There must be a 'server' subdirectory"
   exit 1
 fi
-relnum_file="server/server_config.tcl"
-relnum=`grep '# *RELEASE_NUMBER:' $relnum_file | cut -d: -f2|tr -d '[:space:]'`
+
+relnum_file="server/config/nexus/nxscripts_common_1.tcl"
+relnum=`grep 'Name: RELEASE-' server/config/nexus/nxscripts_common_1.tcl|sed 's/.*\(RELEASE-[^ ]\+\).*/\1/'`
+
 if [ $relnum = "" ]
 then
   echo "Could not find RELEASE_NUMBER: in $relnum_file"