diff --git a/Externals_CAM.cfg b/Externals_CAM.cfg
index 228425040b..dbab4284ca 100644
--- a/Externals_CAM.cfg
+++ b/Externals_CAM.cfg
@@ -65,7 +65,7 @@ required = True
 [geoschem]
 local_path = src/chemistry/geoschem/geoschem_src
 protocol = git
-branch = CESM
+branch = feature/cesm_2.3
 repo_url = https://github.com/CESM-GC/geos-chem
 required = True