diff --git a/lib/lists.nix b/lib/lists.nix
index 75cdf3cbf499..9863c064426d 100644
--- a/lib/lists.nix
+++ b/lib/lists.nix
@@ -1262,7 +1262,7 @@ rec {
         else if dfsthis ? cycle then
           # there's a cycle, starting from the current vertex, return it
           {
-            cycle = reverseList ([ dfsthis.cycle ] ++ dfsthis.visited);
+            cycle = reverseList dfsthis.visited ++ [ dfsthis.cycle ];
             inherit (dfsthis) loops;
           }
         else if toporest ? cycle then