diff --git a/able-script-test/parse_test.able b/able-script-test/parse_test.able
index f3c8d371..4848030f 100644
--- a/able-script-test/parse_test.able
+++ b/able-script-test/parse_test.able
@@ -1 +1 @@
-a()
\ No newline at end of file
+a(3,)
\ No newline at end of file
diff --git a/src/parser/item.rs b/src/parser/item.rs
index 63dafa03..eabea924 100644
--- a/src/parser/item.rs
+++ b/src/parser/item.rs
@@ -2,9 +2,15 @@ use std::collections::HashMap;
 
 use crate::variables::Value;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Hash, PartialEq, Eq)]
 pub struct Iden(pub String);
 
+impl From<Iden> for Expr {
+    fn from(iden: Iden) -> Self {
+        Self::Identifier(iden)
+    }
+}
+
 #[derive(Debug, Clone)]
 pub enum Expr {
     VariableDeclaration {
@@ -27,8 +33,9 @@ pub enum Expr {
 
     FunctionCall {
         iden: Iden,
-        args: HashMap<Iden, Value>,
+        args: Vec<Expr>,
     },
     Literal(Value),
+    Identifier(Iden),
     Melo(Iden),
 }
diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index 24612522..b5a3c4fa 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -142,9 +142,6 @@ impl<'a> Parser<'a> {
                 }
             };
 
-            if token == Token::RightBrace {
-                break;
-            }
             body.push_str(match token {
                 Token::OpGt
                 | Token::OpLt
diff --git a/src/parser/ops.rs b/src/parser/ops.rs
index fb22c304..0e8bb5d7 100644
--- a/src/parser/ops.rs
+++ b/src/parser/ops.rs
@@ -22,10 +22,25 @@ impl<'a> Parser<'a> {
 
     fn fn_call(&mut self, iden: Iden) -> Result<Expr, Error> {
         self.lexer.next();
+        let mut args: Vec<Expr> = Vec::new();
+        while let Some(token) = self.lexer.peek() {
+            match token {
+                Token::Identifier(id) => {
+                    args.push(Iden(id.clone()).into());
+                    self.lexer.next();
+                }
+                Token::RightParenthesis => break,
+                _ => {
+                    let next = self.lexer.next();
+                    args.push(self.parse_expr(next)?)
+                }
+            }
+            self.require(Token::Comma)?;
+        }
         self.require(Token::RightParenthesis)?;
         Ok(Expr::FunctionCall {
             iden,
-            args: HashMap::new(),
+            args, 
         })
     }
 }
diff --git a/src/variables.rs b/src/variables.rs
index cb476b92..fd4a57c9 100644
--- a/src/variables.rs
+++ b/src/variables.rs
@@ -23,6 +23,7 @@ pub enum Value {
     Int(i32),
     Bool(bool),
     Abool(Abool),
+    Nul,
 }
 
 #[derive(Debug)]