diff --git a/parm/config/gefs/config.fcst b/parm/config/gefs/config.fcst
index 8cccd0ce31..c9255db76b 100644
--- a/parm/config/gefs/config.fcst
+++ b/parm/config/gefs/config.fcst
@@ -107,6 +107,7 @@ if (( gwd_opt == 2 )); then
     export launch_level
 fi
 
+# Sponge layer settings
 export d2_bg_k1=0.20
 export d2_bg_k2=0.04
 export dz_min=6
diff --git a/parm/config/gfs/config.fcst b/parm/config/gfs/config.fcst
index 1d79b89599..6f6b7eaa15 100644
--- a/parm/config/gfs/config.fcst
+++ b/parm/config/gfs/config.fcst
@@ -119,6 +119,7 @@ if (( gwd_opt == 2 )); then
     export launch_level
 fi
 
+# Sponge layer settings
 export d2_bg_k1=0.20
 export d2_bg_k2=0.04
 export dz_min=6