diff --git a/src/parser.mly b/src/parser.mly
index a7f5c0d..93bfdfb 100644
--- a/src/parser.mly
+++ b/src/parser.mly
@@ -22,24 +22,6 @@
                 ("The var "^n^" does not exist.", current_location()))
     | Some var -> var
 
-  let type_var (v: t_var) =
-      match v with
-      | IVar _ -> [TInt]
-      | BVar _ -> [TBool]
-      | RVar _ -> [TReal]
-
-  let type_exp : t_expression -> full_ty = function
-    | EVar   (full_ty , _) -> full_ty
-    | EMonOp (full_ty , _ , _) -> full_ty
-    | EBinOp (full_ty , _ , _ , _) -> full_ty
-    | ETriOp (full_ty , _ , _ , _ , _) -> full_ty
-    | EComp  (full_ty , _ , _ , _) -> full_ty
-    | EWhen  (full_ty , _ , _) -> full_ty
-    | EReset (full_ty , _ , _) -> full_ty
-    | EConst (full_ty , _) -> full_ty
-    | ETuple (full_ty , _) -> full_ty
-    | EApp   (full_ty , _ , _) -> full_ty
-
   let concat_varlist  (t1, e1) (t2, e2) = (t1 @ t2, e1 @ e2)
 
   let make_ident (v : t_var) : t_varlist =
@@ -107,15 +89,6 @@
       then ETriOp (t2, op, e1, e2, e3)
       else raise (MyParsingError (error_msg, current_location()))
 
-  let rec debug_type_pp fmt = function
-  | [] -> ()
-  | TInt  :: t -> Format.fprintf fmt "int %a" debug_type_pp t
-  | TBool :: t -> Format.fprintf fmt "bool %a" debug_type_pp t
-  | TReal :: t -> Format.fprintf fmt "real %a" debug_type_pp t
-
-  let debug_type =
-    Format.printf "Type: %a\n" debug_type_pp
-
 %}
 
 %token EOF
@@ -255,8 +228,7 @@ equation:
       let expr = $3 in let texpr = type_exp expr in
       if t_patt = texpr
         then ((t_patt, patt), expr)
-        else (debug_type t_patt; debug_type (type_exp expr);
-          raise (MyParsingError ("The equation does not type check!",
+        else (raise (MyParsingError ("The equation does not type check!",
                     current_location()))) };
 
 pattern:
diff --git a/src/pp.ml b/src/pp.ml
index 34b078f..6ba3e4c 100644
--- a/src/pp.ml
+++ b/src/pp.ml
@@ -1,5 +1,11 @@
 open Ast
 
+  let rec debug_type_pp fmt = function
+  | [] -> ()
+  | TInt  :: t -> Format.fprintf fmt "int %a" debug_type_pp t
+  | TBool :: t -> Format.fprintf fmt "bool %a" debug_type_pp t
+  | TReal :: t -> Format.fprintf fmt "real %a" debug_type_pp t
+
 let pp_loc fmt (start, stop) =
   Lexing.(
     Format.fprintf fmt "%s: <l: %d, c: %d> -- <l: %d, c: %d>"
@@ -118,7 +124,8 @@ let pp_expression =
 let rec pp_equations fmt: t_eqlist -> unit = function
   | [] -> ()
   | (patt, expr) :: eqs ->
-      Format.fprintf fmt "\t\t∗ left side: %a\n\t\t  right side:\n%a\n%a"
+      Format.fprintf fmt "\t\t∗ Equation of type : %a\n\t\t  left side: %a\n\t\t  right side:\n%a\n%a"
+        debug_type_pp (Utils.type_exp expr)
         pp_varlist patt
         pp_expression expr
         pp_equations eqs
diff --git a/src/utils.ml b/src/utils.ml
index 31f9c33..fa54da9 100644
--- a/src/utils.ml
+++ b/src/utils.ml
@@ -1,3 +1,5 @@
+open Ast
+
 let rec list_repeat n elt =
   if n = 0 then [] else elt :: (list_repeat (n-1) elt)
 
@@ -6,3 +8,22 @@ let rec list_chk v = function
   | h :: t -> if h = v then true else list_chk v t
 
 exception MyParsingError of (string * Ast.location)
+
+let type_var (v: t_var) =
+    match v with
+    | IVar _ -> [TInt]
+    | BVar _ -> [TBool]
+    | RVar _ -> [TReal]
+
+let type_exp : t_expression -> full_ty = function
+  | EVar   (full_ty , _) -> full_ty
+  | EMonOp (full_ty , _ , _) -> full_ty
+  | EBinOp (full_ty , _ , _ , _) -> full_ty
+  | ETriOp (full_ty , _ , _ , _ , _) -> full_ty
+  | EComp  (full_ty , _ , _ , _) -> full_ty
+  | EWhen  (full_ty , _ , _) -> full_ty
+  | EReset (full_ty , _ , _) -> full_ty
+  | EConst (full_ty , _) -> full_ty
+  | ETuple (full_ty , _) -> full_ty
+  | EApp   (full_ty , _ , _) -> full_ty
+