diff --git a/cask/src-3/cask/router/Macros.scala b/cask/src-3/cask/router/Macros.scala
index e93eef5711..e56e8cd6a4 100644
--- a/cask/src-3/cask/router/Macros.scala
+++ b/cask/src-3/cask/router/Macros.scala
@@ -261,7 +261,7 @@ object Macros {
           sigss: Seq[Seq[ArgSig[Any, _, _, Any]]]
         ) => {
           val parsedArgss: Seq[Seq[Either[Seq[cask.router.Result.ParamError], Any]]] =
-            (sigss, argss, ctxs).zipped.map { case (sigs, args, ctx) =>
+            sigss.lazyZip(argss).lazyZip(ctxs).map { case (sigs, args, ctx) =>
               sigs.map{ case sig =>
                 Runtime.makeReadCall(
                   args,