diff --git a/src/parz/combinators.gleam b/src/parz/combinators.gleam
index 6bca6c9..19e45b5 100644
--- a/src/parz/combinators.gleam
+++ b/src/parz/combinators.gleam
@@ -91,15 +91,18 @@ pub fn maybe(parser) {
   }
 }
 
-fn many_rec(parser: Parser(a), input, acc) {
+fn many_rec(
+  parser: Parser(a),
+  input,
+  acc,
+) -> Result(ParserState(List(a)), String) {
   case parser(input) {
     Error(err) -> Error(err)
     Ok(ok) -> {
       case many_rec(parser, ok.remaining, acc) {
-        Error(_) -> Ok(#([ok.matched], ok.remaining))
+        Error(_) -> Ok(ParserState([ok.matched], ok.remaining))
         Ok(rec) -> {
-          let #(matches, remaining) = rec
-          Ok(#([ok.matched, ..matches], remaining))
+          Ok(ParserState([ok.matched, ..rec.matched], rec.remaining))
         }
       }
     }
@@ -113,7 +116,7 @@ pub fn many1(parser: Parser(a)) {
 pub fn many(parser: Parser(a)) {
   fn(input) {
     case many1(parser)(input) {
-      Error(_) -> Ok(#([], input))
+      Error(_) -> Ok(ParserState([], input))
       Ok(ok) -> Ok(ok)
     }
   }
diff --git a/test/combinators_test.gleam b/test/combinators_test.gleam
index 22d04fb..8ef1421 100644
--- a/test/combinators_test.gleam
+++ b/test/combinators_test.gleam
@@ -83,19 +83,19 @@ pub fn many_test() {
 
   run(parser, "!")
   |> should.be_ok
-  |> should.equal(#([], "!"))
+  |> should.equal(ParserState([], "!"))
 
   run(parser, "x")
   |> should.be_ok
-  |> should.equal(#(["x"], ""))
+  |> should.equal(ParserState(["x"], ""))
 
   run(parser, "xxx")
   |> should.be_ok
-  |> should.equal(#(["x", "x", "x"], ""))
+  |> should.equal(ParserState(["x", "x", "x"], ""))
 
   run(parser, "xx!")
   |> should.be_ok
-  |> should.equal(#(["x", "x"], "!"))
+  |> should.equal(ParserState(["x", "x"], "!"))
 }
 
 pub fn many1_test() {
@@ -106,15 +106,15 @@ pub fn many1_test() {
 
   run(parser, "x")
   |> should.be_ok
-  |> should.equal(#(["x"], ""))
+  |> should.equal(ParserState(["x"], ""))
 
   run(parser, "xxx")
   |> should.be_ok
-  |> should.equal(#(["x", "x", "x"], ""))
+  |> should.equal(ParserState(["x", "x", "x"], ""))
 
   run(parser, "xx!")
   |> should.be_ok
-  |> should.equal(#(["x", "x"], "!"))
+  |> should.equal(ParserState(["x", "x"], "!"))
 }
 
 pub fn sequence_test() {