diff --git a/ush/forecast_predet.sh b/ush/forecast_predet.sh
index 3ea9792902..b6ba2dc43e 100755
--- a/ush/forecast_predet.sh
+++ b/ush/forecast_predet.sh
@@ -208,7 +208,7 @@ FV3_GFS_predet(){
   print_freq=${print_freq:-6}
 
   #-------------------------------------------------------
-  if [ $CDUMP = "gfs" || $RUN = "gefs" ] && [ $rst_invt1 -gt 0 ] && [ $MEMBER -lt 0 ]; then
+  if [[ $CDUMP = "gfs" || $RUN = "gefs" ]] && [ $rst_invt1 -gt 0 ] && [ $MEMBER -lt 0 ]; then
     RSTDIR_ATM=${RSTDIR_ATM:-${RSTDIR:-$ROTDIR}/${CDUMP}.${PDY}/${cyc}/atmos/RERUN_RESTART}
     if [ ! -d $RSTDIR_ATM ]; then mkdir -p $RSTDIR_ATM ; fi
     $NLN $RSTDIR_ATM RESTART
@@ -232,7 +232,7 @@ FV3_GFS_predet(){
 
   #-------------------------------------------------------
   # member directory
-  if [ $MEMBER -lt 0 || $RUN = "gefs" ]; then
+  if [[ $MEMBER -lt 0 || $RUN = "gefs" ]]; then
     prefix=$CDUMP
     rprefix=$rCDUMP
     memchar=""