diff --git a/components/elm/bld/namelist_files/namelist_defaults.xml b/components/elm/bld/namelist_files/namelist_defaults.xml
index c78c8f7582ee..69d12d39fedf 100644
--- a/components/elm/bld/namelist_files/namelist_defaults.xml
+++ b/components/elm/bld/namelist_files/namelist_defaults.xml
@@ -230,7 +230,7 @@ lnd/clm2/surfdata_map/surfdata_ne0np4_northamericax4v1.pg2_simyr1850_c210112.nc<
 lnd/clm2/surfdata_map/surfdata_ne0np4_northamericax4v1.pg2_simyr2010_c210112.nc</fsurdat>
 
 <!-- ne0np4_arcticx4v1.pg2 -->
-<finidat hgrid="ne0np4_arcticx4v1.pg2">lnd/clm2/initdata/arcticx4v1pg2_oARRM60to10.ICRUELM.spinup-from-interp.elm.r.0051-01-01-00000.nc</finidat>
+<finidat hgrid="ne0np4_arcticx4v1.pg2"  mask="oARRM60to10">lnd/clm2/initdata/arcticx4v1pg2_oARRM60to10.ICRUELM.spinup-from-interp.elm.r.0051-01-01-00000.nc</finidat>
 <finidat hgrid="ne0np4_arcticx4v1.pg2"  mask="ARRM10to60E2r1" sim_year="1950">lnd/clm2/initdata/20221017.ICRUELM-1950.arcticx4v1pg2_ARRM10to60E2r1.anvil.elm.r.0051-01-01-00000.nc</finidat>
 <fsurdat hgrid="ne0np4_arcticx4v1.pg2"   sim_year="2010" use_crop=".false." >
 lnd/clm2/surfdata_map/surfdata_arcticx4v1pg2_simyr2010_c210805.nc</fsurdat>