diff --git a/parm/land/letkfoi/apply_incr_nml.j2 b/parm/land/letkfoi/apply_incr_nml.j2
index 39765a5d3..d12b00150 100644
--- a/parm/land/letkfoi/apply_incr_nml.j2
+++ b/parm/land/letkfoi/apply_incr_nml.j2
@@ -6,5 +6,5 @@
   rst_path = "{{ DATA }}/anl",
   inc_path = "{{ DATA }}/anl",
   orog_path = "{{ HOMEgfs }}/fix/orog/{{ CASE }}",
-  otype = "{{ CASE }}_oro_data"
+  otype = "{{ CASE }}.mx{{ OCNRES }}_oro_data"
 /
diff --git a/parm/land/letkfoi/letkfoi.yaml b/parm/land/letkfoi/letkfoi.yaml
index da2540852..26ee0e009 100644
--- a/parm/land/letkfoi/letkfoi.yaml
+++ b/parm/land/letkfoi/letkfoi.yaml
@@ -17,7 +17,7 @@ geometry:
       skip coupler file: true
       state variables: [orog_filt]
       datapath: $(FIXgfs)/orog/${CASE}/
-      filename_orog: $(CASE)_oro_data.nc
+      filename_orog: $(CASE).mx$(OCNRES)_oro_data.nc
 
 time window:
   begin: '{{ LAND_WINDOW_BEGIN | to_isotime }}'