diff --git a/server.pl b/server.pl
index 36f5172..4d3e866 100755
--- a/server.pl
+++ b/server.pl
@@ -157,15 +157,16 @@ commits([Commit|Rest], [CommitInfo|CommitInfos]) :-
     commits(Rest, CommitInfos).
 
 list_set(ListOfList, Functor, Result) :-
-    setof(
+    findall(
         Item,
         (
             member(L, ListOfList),
             Pred =.. [Functor, Item],
             member(Pred, L)
         ),
-        Result
-    ).
+        ResultList
+    ),
+    list_to_set(ResultList, Result).
 filetype_suffix(File, SuffixLower) :-
     split_string(File, ".", "", Parts),
     length(Parts, Length),