diff --git a/examples/dgfip_c/desc_static.h.inc b/examples/dgfip_c/desc_static.h.inc
index 6f520cae6..49a556178 100644
--- a/examples/dgfip_c/desc_static.h.inc
+++ b/examples/dgfip_c/desc_static.h.inc
@@ -4,14 +4,6 @@
 
 #include "conf.h"
 
-struct S_desc_var
-{
-  char *nom;
-  int indice;
-  long type_donnee;
-  T_discord * (*verif)(T_irdata *);
-};
-
 typedef struct S_desc_contexte
 {
   char *nom;
@@ -56,7 +48,7 @@ typedef struct S_desc_revenu
   int rapcat;
   int sanction;
   int modcat;
-  T_desc_var *liee;
+  T_var_irdata liee;
   char *libelle;
   char *code;
 } T_desc_revenu;
@@ -78,7 +70,7 @@ typedef struct S_desc_revenu_correc
   int rapcat;
   int sanction;
   int modcat;
-  T_desc_var *liee;
+  T_var_irdata liee;
   char *libelle;
 } T_desc_revenu_correc;
 
@@ -131,7 +123,7 @@ typedef struct S_desc_debug
   int sanction;
   int modcat;
   int nat_code;
-  T_desc_var *liee;
+  T_var_irdata liee;
 #ifdef FLG_EXTRACTION
   int est_extraite;
 #endif /* FLG_EXTRACTION */
diff --git a/examples/dgfip_c/irdata.c b/examples/dgfip_c/irdata.c
index 5756cf463..07d48ed37 100644
--- a/examples/dgfip_c/irdata.c
+++ b/examples/dgfip_c/irdata.c
@@ -6,6 +6,16 @@
 #include <string.h>
 #include "var.h"
 
+struct S_desc_var
+{
+  char *nom;
+  int indice;
+  long type_donnee;
+  T_discord * (*verif)(T_irdata *);
+};
+
+typedef struct S_desc_var T_desc_var;
+
 static bool alloc_tab(double **tab, char **def_tab, int taille)
 {
   if ((tab == NULL) || (def_tab == NULL)) {
@@ -154,8 +164,9 @@ void IRDATA_reset_erreur(T_irdata *irdata)
 #endif /* FLG_MULTITHREAD */
 }
 
-T_discord * IRDATA_range(T_irdata *irdata, T_desc_var *desc, double valeur)
+T_discord * IRDATA_range(T_irdata *irdata, T_var_irdata p_desc, double valeur)
 {
+  T_desc_var *desc = (T_desc_var *)p_desc;
   int indice = 0;
   T_discord *discord = NULL;
   if (valeur < 0) {
@@ -181,8 +192,9 @@ T_discord * IRDATA_range(T_irdata *irdata, T_desc_var *desc, double valeur)
   return discord;
 }
 
-void IRDATA_range_base(T_irdata *irdata, T_desc_var *desc, double valeur)
+void IRDATA_range_base(T_irdata *irdata, T_var_irdata p_desc, double valeur)
 {
+  T_desc_var *desc = (T_desc_var *)p_desc;
 #ifdef FLG_COMPACT
   int indice = desc->indice;
   irdata->defs[indice] = 1;
@@ -206,8 +218,9 @@ void IRDATA_range_base(T_irdata *irdata, T_desc_var *desc, double valeur)
 #endif /* FLG_COMPACT */
 }
 
-struct S_discord * IRDATA_range_tableau(T_irdata *irdata, T_desc_var *desc, int ind, double valeur)
+struct S_discord * IRDATA_range_tableau(T_irdata *irdata, T_var_irdata p_desc, int ind, double valeur)
 {
+  T_desc_var *desc = (T_desc_var *)p_desc;
   int indice = 0;
   T_discord *discord = NULL;
   discord = (*desc->verif)(irdata);
@@ -238,8 +251,9 @@ struct S_discord * IRDATA_range_tableau(T_irdata *irdata, T_desc_var *desc, int
   return discord;
 }
 
-double * IRDATA_extrait_special(T_irdata *irdata, T_desc_var *desc)
+double * IRDATA_extrait_special(T_irdata *irdata, T_var_irdata p_desc)
 {
+  T_desc_var *desc = (T_desc_var *)p_desc;
   double *res = NULL;
 #ifdef FLG_COMPACT
   int indice = desc->indice;
@@ -264,8 +278,9 @@ double * IRDATA_extrait_special(T_irdata *irdata, T_desc_var *desc)
   return res;
 }
 
-double * IRDATA_extrait_tableau(T_irdata *irdata, T_desc_var *desc, int ind)
+double * IRDATA_extrait_tableau(T_irdata *irdata, T_var_irdata p_desc, int ind)
 {
+  T_desc_var *desc = (T_desc_var *)p_desc;
   double *res = NULL;
 #ifdef FLG_COMPACT
   int indice = desc->indice + ind;
@@ -290,7 +305,7 @@ double * IRDATA_extrait_tableau(T_irdata *irdata, T_desc_var *desc, int ind)
   return res;
 }
 
-static T_desc_var * cherche_desc_var(const char *nom, T_desc_var *table, int taille, int sup)
+static T_var_irdata cherche_desc_var(const char *nom, T_var_irdata table, int taille, int sup)
 {
   T_desc_var *desc = NULL;
   int res = -1, inf = 0, millieu;
@@ -302,12 +317,12 @@ static T_desc_var * cherche_desc_var(const char *nom, T_desc_var *table, int tai
     else if (res > 0) inf = millieu + 1;
   }
   if (res == 0)
-    return desc;
+    return (T_var_irdata)desc;
   else
     return NULL;
 }
 
-T_desc_var * IRDATA_cherche_desc_var(const char *nom)
+T_var_irdata IRDATA_cherche_desc_var(const char *nom)
 {
   static T_desc_var * desc[6] = {
     (T_desc_var *)desc_contexte, (T_desc_var *)desc_famille, (T_desc_var *)desc_revenu,
@@ -321,7 +336,7 @@ T_desc_var * IRDATA_cherche_desc_var(const char *nom)
   int i = 0;
   for (i = 0; i < 6; ++i) {
     T_desc_var *res = cherche_desc_var(nom, desc[i], size[i], nb[i]);
-    if (res != NULL) return res;
+    if (res != NULL) return (T_var_irdata)res;
   }
   return NULL;
 }
diff --git a/examples/dgfip_c/irdata.h b/examples/dgfip_c/irdata.h
index 85217176c..e03f49168 100644
--- a/examples/dgfip_c/irdata.h
+++ b/examples/dgfip_c/irdata.h
@@ -24,9 +24,8 @@
 #define DATE           (DATE_JJMMAAAA|DATE_MMAAAA|DATE_AAAA|DATE_JJMM|DATE_MM)
 #define NUMERIQUE      (ENTIER|REEL|REEL1|REEL2|REEL3)
 
-#define T_var_irdata T_desc_var *
+typedef void *T_var_irdata;
 
-typedef struct S_desc_var T_desc_var;
 typedef struct S_irdata T_irdata;
 typedef struct S_discord T_discord;
 typedef struct S_erreur T_erreur;
@@ -43,14 +42,14 @@ extern void IRDATA_recopie_irdata(T_irdata *src_irdata, T_irdata *dst_irdata);
 
 extern void IRDATA_reset_erreur(T_irdata *irdata);
 
-extern T_discord * IRDATA_range(T_irdata *irdata, T_desc_var *desc, double valeur);
-extern void IRDATA_range_base(T_irdata *irdata, T_desc_var *desc, double valeur);
-struct S_discord *IRDATA_range_tableau(T_irdata *irdata, T_desc_var *desc, int ind, double valeur);
+extern T_discord * IRDATA_range(T_irdata *irdata, T_var_irdata desc, double valeur);
+extern void IRDATA_range_base(T_irdata *irdata, T_var_irdata desc, double valeur);
+struct S_discord *IRDATA_range_tableau(T_irdata *irdata, T_var_irdata desc, int ind, double valeur);
 
-extern double * IRDATA_extrait_special (T_irdata *irdata, T_desc_var *desc);
-double * IRDATA_extrait_tableau(T_irdata *irdata, T_desc_var *desc, int ind);
+extern double * IRDATA_extrait_special (T_irdata *irdata, T_var_irdata desc);
+double * IRDATA_extrait_tableau(T_irdata *irdata, T_var_irdata desc, int ind);
 
-extern T_desc_var * IRDATA_cherche_desc_var(const char *nom);
+extern T_var_irdata IRDATA_cherche_desc_var(const char *nom);
 
 extern T_discord * err_NEGATIF(T_irdata *irdata);
 
diff --git a/examples/dgfip_c/ml_primitif/stubs.c b/examples/dgfip_c/ml_primitif/stubs.c
index fd3f57698..4d8759ecc 100644
--- a/examples/dgfip_c/ml_primitif/stubs.c
+++ b/examples/dgfip_c/ml_primitif/stubs.c
@@ -37,6 +37,18 @@ CAMLexport value caml_alloc_some(value v)
 extern T_desc_penalite desc_penalite[];
 extern T_desc_debug desc_debug01[];
 
+struct S_desc_var
+{
+  char *nom;
+  int indice;
+  long type_donnee;
+  T_discord * (*verif)(T_irdata *);
+};
+
+typedef struct S_desc_var T_desc_var;
+
+#define T_var_irdata T_desc_var *
+
 typedef void (*ench_fun)(T_irdata *);
 
 typedef struct ench_t {