diff --git a/sorc/checkout.sh b/sorc/checkout.sh
index 9bbb7ceb72..516621689f 100755
--- a/sorc/checkout.sh
+++ b/sorc/checkout.sh
@@ -99,7 +99,7 @@ if [[ ! -d gsd_prep_chem.fd ]] ; then
     rc=$?
     ((err+=$rc))
     cd gsd_prep_chem.fd
-    git checkout gefs_v12.0.1
+    git checkout gefs_v12.0.1-2
     cd ${topdir}
 else
     echo 'Skip.  Directory gsd_prep_chem.fd already exists.'