diff --git a/ush/forecast_det.sh b/ush/forecast_det.sh
index 198df6505f..a1c153776b 100755
--- a/ush/forecast_det.sh
+++ b/ush/forecast_det.sh
@@ -45,7 +45,8 @@ FV3_det(){
 
   RERUN=${RERUN:-"NO"}
   # Get a list of all YYYYMMDD.HH0000.coupler.res files from the atmos restart directory
-  mapfile -t file_array < <(find "${COM_ATMOS_RESTART:-/dev/null}" -name "????????.??0000.coupler.res")
+  # shellcheck disable=SC2312
+  mapfile -t file_array < <(find "${COM_ATMOS_RESTART:-/dev/null}" -name "????????.??0000.coupler.res" | sort)
   if [[ ( "${RUN}" = "gfs" || "${RUN}" = "gefs" ) \
     && "${#file_array[@]}" -gt 0 ]]; then