diff --git a/parm/atm/jcb-base.yaml.j2 b/parm/atm/jcb-base.yaml.j2
index 5fc149700..5f92cffbb 100644
--- a/parm/atm/jcb-base.yaml.j2
+++ b/parm/atm/jcb-base.yaml.j2
@@ -67,6 +67,7 @@ atmosphere_forecast_timestep: "{{ BKG_TSTEP }}"
 atmosphere_final_increment_prefix: "./anl/atminc."
 
 atmosphere_variational_history_prefix: "{{GPREFIX}}"
+atmosphere_ensemble_history_prefix: "enkf{{GPREFIX}}"
 
 # Observation things
 # ------------------
diff --git a/parm/jcb-gdas b/parm/jcb-gdas
index 3863e7322..075eb9203 160000
--- a/parm/jcb-gdas
+++ b/parm/jcb-gdas
@@ -1 +1 @@
-Subproject commit 3863e73224110d84bc216bdc4fd0dbe0bd388911
+Subproject commit 075eb92038f7837d60139ddf08a43c71edf960ab