diff --git a/ast.ml b/ast.ml
index f27437c..00b3e14 100644
--- a/ast.ml
+++ b/ast.ml
@@ -49,11 +49,19 @@ module Syntax = struct
 
   type block = instr list
 
+  type arg =
+    | Arg of
+        { type_t : type_t
+        ; name : ident
+        }
+
+  type args = arg list
+
   type def =
     | Func of
         { func : ident
         ; type_t : type_t
-        ; args : ident list
+        ; args : args
         ; code : block
         ; pos : Lexing.position
         }
diff --git a/parser.mly b/parser.mly
index aae18b8..1c739a3 100644
--- a/parser.mly
+++ b/parser.mly
@@ -18,7 +18,7 @@
 
 %type <Ast.Syntax.block> block
 %type <Ast.Syntax.prog> prog
-%type <Ast.Syntax.ident list> args_ident
+%type <Ast.Syntax.args> args_ident
 %type <Ast.Syntax.expr list> args_expr
 
 %%
@@ -52,17 +52,20 @@ args_ident:
   | Lpardeb ; s = args_ident { s }
 
   /* a, ... */
-  | a = arg_ident ; Lcomma ; s = args_ident { a @ s }
+  | t = Ltype ; a = arg_ident ; Lcomma ; s = args_ident { Arg { type_t = t
+                                                              ; name = a
+                                                              } :: s }
 
   /* c) */
-  | a = arg_ident ; Lparfin { a }
+  | t = Ltype ; a = arg_ident ; Lparfin { [ Arg { type_t = t
+                                                ; name = a } ] }
 
   /* ) */
   | Lparfin { [] }
 
 arg_ident:
   /* Argument */
-  | a = Lvar { [ a ] }
+  | a = Lvar { a }
 
 block:
   /* { */
diff --git a/semantics.ml b/semantics.ml
index 406cb4a..8ba91cf 100644
--- a/semantics.ml
+++ b/semantics.ml
@@ -69,7 +69,15 @@ let rec analyze_block env ua = function
 ;;
 
 let analyze_func env ua = function
-  | Syntax.Func f -> Func (f.func, f.args, analyze_block env ua f.code)
+  | Syntax.Func f ->
+    Func
+      ( f.func
+      , List.map
+          (fun a ->
+            match a with
+            | Syntax.Arg a -> a.name)
+          f.args
+      , analyze_block env ua f.code )
 ;;
 
 let rec analyze_prog env ua = function
diff --git a/test.ml b/test.ml
index f1d9b39..d80a663 100644
--- a/test.ml
+++ b/test.ml
@@ -25,7 +25,13 @@ let debug_parser oc parsed =
       ^ ", \""
       ^ d.func
       ^ ", ["
-      ^ String.concat "\n; " d.args
+      ^ String.concat
+          "\n; "
+          (List.map
+             (fun a ->
+               match a with
+               | Syntax.Arg a -> " (" ^ string_of_type_t a.type_t ^ ")" ^ a.name ^ " ")
+             d.args)
       ^ "], ["
       ^ fmt_b d.code
       ^ "])\n"
diff --git a/tests/11_def.test b/tests/11_def.test
index 80c7e77..ad8e75b 100644
--- a/tests/11_def.test
+++ b/tests/11_def.test
@@ -1,8 +1,9 @@
-int cops_calculator () {
-    int res = 13 * 100 + 20 - 8;
+int cops_calculator (int a) {
+    int res = a * 100 + 20 - 8;
     return res * 2 / 2;
 }
 
 void main () {
-    cops_calculator();
+    int magic_number = 13;
+    cops_calculator(magic_number);
 }