diff --git a/definitions/grib2/template.4.horizontal.def b/definitions/grib2/template.4.horizontal.def
index 4e58946dd..2df32161e 100755
--- a/definitions/grib2/template.4.horizontal.def
+++ b/definitions/grib2/template.4.horizontal.def
@@ -76,7 +76,7 @@ if (extraDim) {
     }
     concept mars.levtype (unknown,"marsLevtypeConcept.def",conceptsDir2,conceptsDir1):no_copy;
     # GRIB-372: levelist alias does not pertain to surface parameters
-    if (levtype is "sfc") {
+    if (levtype is "sfc" || levtype is "o2d") {
         unalias mars.levelist;
     }
 }