diff --git a/src/mod_pubsub/mod_pubsub.erl b/src/mod_pubsub/mod_pubsub.erl
index a275b0104..0c713dd3d 100644
--- a/src/mod_pubsub/mod_pubsub.erl
+++ b/src/mod_pubsub/mod_pubsub.erl
@@ -631,7 +631,7 @@ disco_local_features(Acc, _From, To, [], _Lang) ->
     end,
     {result, Feats ++ lists:map(fun(Feature) ->
 	?NS_PUBSUB++"#"++Feature
-    end, features(Host, []))};
+    end, features(Host, <<>>))};
 disco_local_features(Acc, _From, _To, _Node, _Lang) ->
     Acc.
 
diff --git a/src/mod_pubsub/mod_pubsub_odbc.erl b/src/mod_pubsub/mod_pubsub_odbc.erl
index 25c3bf85f..bafd7503d 100644
--- a/src/mod_pubsub/mod_pubsub_odbc.erl
+++ b/src/mod_pubsub/mod_pubsub_odbc.erl
@@ -434,7 +434,7 @@ disco_local_features(Acc, _From, To, [], _Lang) ->
     end,
     {result, Feats ++ lists:map(fun(Feature) ->
 	?NS_PUBSUB++"#"++Feature
-    end, features(Host, []))};
+    end, features(Host, <<>>))};
 disco_local_features(Acc, _From, _To, _Node, _Lang) ->
     Acc.