diff --git a/src/aeb_fate_encoding.erl b/src/aeb_fate_encoding.erl
index 09d9992..8a62178 100644
--- a/src/aeb_fate_encoding.erl
+++ b/src/aeb_fate_encoding.erl
@@ -486,7 +486,5 @@ sort(KVList) ->
 
 valid_key_type(K) when ?IS_FATE_MAP(K) ->
     error({map_as_key_in_map, K});
-valid_key_type(K) when ?IS_FATE_VARIANT(K) ->
-    error({variant_as_key_in_map, K});
 valid_key_type(_K) ->
     true.