diff --git a/crates/aiken-lang/src/parser.rs b/crates/aiken-lang/src/parser.rs
index 0a4253ba..06802f9a 100644
--- a/crates/aiken-lang/src/parser.rs
+++ b/crates/aiken-lang/src/parser.rs
@@ -514,9 +514,12 @@ pub fn fn_param_parser() -> impl Parser<Token, ast::UntypedArg, Error = ParseErr
                 name,
                 location: span,
             }),
-        select! {Token::Name {name} => name}.map_with_span(|name, span| ast::ArgName::Named {
-            name,
-            location: span,
+        select! {Token::Name {name} => name}.map_with_span(|name, span| {
+            ast::ArgName::NamedLabeled {
+                label: name.clone(),
+                name,
+                location: span,
+            }
         }),
     ))
     .then(just(Token::Colon).ignore_then(type_parser()).or_not())
diff --git a/crates/aiken-lang/src/tests/parser.rs b/crates/aiken-lang/src/tests/parser.rs
index ab1cff40..a25369f6 100644
--- a/crates/aiken-lang/src/tests/parser.rs
+++ b/crates/aiken-lang/src/tests/parser.rs
@@ -320,7 +320,8 @@ fn plus_binop() {
         code,
         ast::UntypedDefinition::Fn(Function {
             arguments: vec![ast::Arg {
-                arg_name: ast::ArgName::Named {
+                arg_name: ast::ArgName::NamedLabeled {
+                    label: "a".to_string(),
                     name: "a".to_string(),
                     location: Span::new((), 15..16),
                 },
@@ -537,7 +538,8 @@ fn let_bindings() {
         code,
         ast::UntypedDefinition::Fn(Function {
             arguments: vec![ast::Arg {
-                arg_name: ast::ArgName::Named {
+                arg_name: ast::ArgName::NamedLabeled {
+                    label: "a".to_string(),
                     name: "a".to_string(),
                     location: Span::new((), 11..12),
                 },
@@ -661,7 +663,8 @@ fn block() {
         code,
         ast::UntypedDefinition::Fn(Function {
             arguments: vec![ast::Arg {
-                arg_name: ast::ArgName::Named {
+                arg_name: ast::ArgName::NamedLabeled {
+                    label: "a".to_string(),
                     name: "a".to_string(),
                     location: Span::new((), 12..13),
                 },
@@ -754,7 +757,8 @@ fn when() {
         code,
         ast::UntypedDefinition::Fn(Function {
             arguments: vec![ast::Arg {
-                arg_name: ast::ArgName::Named {
+                arg_name: ast::ArgName::NamedLabeled {
+                    label: "a".to_string(),
                     name: "a".to_string(),
                     location: Span::new((), 12..13),
                 },
@@ -982,7 +986,8 @@ fn field_access() {
         code,
         ast::UntypedDefinition::Fn(Function {
             arguments: vec![ast::Arg {
-                arg_name: ast::ArgName::Named {
+                arg_name: ast::ArgName::NamedLabeled {
+                    label: "user".to_string(),
                     name: "user".to_string(),
                     location: Span::new((), 8..12),
                 },
@@ -1186,7 +1191,8 @@ fn record_update() {
         ast::UntypedDefinition::Fn(Function {
             arguments: vec![
                 ast::Arg {
-                    arg_name: ast::ArgName::Named {
+                    arg_name: ast::ArgName::NamedLabeled {
+                        label: "user".to_string(),
                         name: "user".to_string(),
                         location: Span::new((), 15..19),
                     },
@@ -1200,7 +1206,8 @@ fn record_update() {
                     tipo: (),
                 },
                 ast::Arg {
-                    arg_name: ast::ArgName::Named {
+                    arg_name: ast::ArgName::NamedLabeled {
+                        label: "name".to_string(),
                         name: "name".to_string(),
                         location: Span::new((), 27..31),
                     },