diff --git a/util/gdas_init/driver.s4.sh b/util/gdas_init/driver.s4.sh
index b0a78fbc0..efd54be3b 100755
--- a/util/gdas_init/driver.s4.sh
+++ b/util/gdas_init/driver.s4.sh
@@ -22,6 +22,8 @@ QUEUE=s4
 
 source config
 
+export machine=s4
+
 if [ $EXTRACT_DATA == yes ]; then
 
   echo "HPSS is not accessible from S4!  If you wish to run just the chgres portion, set EXTRACT_DATA=NO in the config file and try again."
diff --git a/util/gdas_init/set_fixed_files.sh b/util/gdas_init/set_fixed_files.sh
index a3fca4a85..54c9916f0 100755
--- a/util/gdas_init/set_fixed_files.sh
+++ b/util/gdas_init/set_fixed_files.sh
@@ -29,6 +29,8 @@ elif [ "$machine" = 'wcoss2' ] ; then
   FIX_ORO_INPUT=/lfs/h2/emc/global/noscrub/emc.global/FIX/fix/orog/20230615
 elif [ "$machine" = 'jet' ] ; then
   FIX_ORO_INPUT=/lfs4/HFIP/hfv3gfs/glopara/git/fv3gfs/fix/orog/20230615
+elif [ "$machine" = 's4' ] ; then
+  FIX_ORO_INPUT=/data/prod/glopara/fix/orog/20230615
 else
   set +x
   echo ERROR machine $machine not supported.