diff --git a/CIME/case/case_setup.py b/CIME/case/case_setup.py
index 841e90391d0..c9017db915b 100644
--- a/CIME/case/case_setup.py
+++ b/CIME/case/case_setup.py
@@ -28,6 +28,7 @@
 
 logger = logging.getLogger(__name__)
 
+
 ###############################################################################
 def _build_usernl_files(case, model, comp):
     ###############################################################################
@@ -421,6 +422,14 @@ def _case_setup_impl(
                 run_cmd_no_fail(
                     "{}/cime_config/cism.template {}".format(glcroot, caseroot)
                 )
+            if comp == "cam":
+                camroot = case.get_value("COMP_ROOT_DIR_ATM")
+                logger.debug("Running cam.case_setup.py")
+                run_cmd_no_fail(
+                    "python {cam}/cime_config/cam.case_setup.py {cam} {case}".format(
+                        cam=camroot, case=caseroot
+                    )
+                )
 
         _build_usernl_files(case, "drv", "cpl")