diff --git a/openair3/NAS/UE/ESM/PdnConnectivity.c b/openair3/NAS/UE/ESM/PdnConnectivity.c
index 2c3b6a9bf40003bbebcfc52afb9dcb5f6eda290b..c355c3f805f10010aa4a3520b94eae43e3653152 100755
--- a/openair3/NAS/UE/ESM/PdnConnectivity.c
+++ b/openair3/NAS/UE/ESM/PdnConnectivity.c
@@ -309,7 +309,7 @@ int esm_proc_pdn_connectivity_request(nas_user_t *user, int is_standalone, int p
 
     if (rc != RETURNerror) {
       /* Start T3482 retransmission timer */
-      rc = esm_pt_start_timer(pti, msg, T3482_DEFAULT_VALUE,
+      rc = esm_pt_start_timer(user, pti, msg, T3482_DEFAULT_VALUE,
                               _pdn_connectivity_t3482_handler);
     }
   }
@@ -642,7 +642,7 @@ static void *_pdn_connectivity_t3482_handler(void *args)
 
     if (rc != RETURNerror) {
       /* Restart the timer T3482 */
-      rc = esm_pt_start_timer(data->pti, &data->msg, T3482_DEFAULT_VALUE,
+      rc = esm_pt_start_timer(user, data->pti, &data->msg, T3482_DEFAULT_VALUE,
                               _pdn_connectivity_t3482_handler);
     }
   } else {
diff --git a/openair3/NAS/UE/ESM/PdnDisconnect.c b/openair3/NAS/UE/ESM/PdnDisconnect.c
index 96ec0938ab536d8bcd1dd19b320a9fc3ced8daa1..8a44e9148865c629b68163f4dbf4e8f5f37e2c1f 100755
--- a/openair3/NAS/UE/ESM/PdnDisconnect.c
+++ b/openair3/NAS/UE/ESM/PdnDisconnect.c
@@ -198,7 +198,7 @@ int esm_proc_pdn_disconnect_request(nas_user_t *user, int is_standalone, int pti
 
     if (rc != RETURNerror) {
       /* Start T3482 retransmission timer */
-      rc = esm_pt_start_timer(pti, msg, T3492_DEFAULT_VALUE,
+      rc = esm_pt_start_timer(user, pti, msg, T3492_DEFAULT_VALUE,
                               _pdn_disconnect_t3492_handler);
     }
   }
@@ -389,7 +389,6 @@ int esm_proc_pdn_disconnect_reject(nas_user_t *user, int pti, int *esm_cause)
 static void *_pdn_disconnect_t3492_handler(void *args)
 {
   LOG_FUNC_IN;
-  // FIXME check callback call
   nas_user_t *user = args;
   esm_data_t *esm_data = _esm_data;;
   int rc;
@@ -418,7 +417,7 @@ static void *_pdn_disconnect_t3492_handler(void *args)
 
     if (rc != RETURNerror) {
       /* Restart the timer T3492 */
-      rc = esm_pt_start_timer(data->pti, &data->msg, T3492_DEFAULT_VALUE,
+      rc = esm_pt_start_timer(user, data->pti, &data->msg, T3492_DEFAULT_VALUE,
                               _pdn_disconnect_t3492_handler);
     }
   } else {
diff --git a/openair3/NAS/UE/ESM/esm_pt.c b/openair3/NAS/UE/ESM/esm_pt.c
index a4540684e29d8d708c8fd8cca356ba5947d1aee9..0861912845c918db32cb4bf8dcced1cc1755c56c 100755
--- a/openair3/NAS/UE/ESM/esm_pt.c
+++ b/openair3/NAS/UE/ESM/esm_pt.c
@@ -271,7 +271,7 @@ int esm_pt_release(int pti)
  **      Others:    _esm_pt_data                               **
  **                                                                        **
  ***************************************************************************/
-int esm_pt_start_timer(int pti, const OctetString *msg,
+int esm_pt_start_timer(nas_user_t *user, int pti, const OctetString *msg,
                        long sec, nas_timer_callback_t cb)
 {
   LOG_FUNC_IN;
@@ -298,6 +298,7 @@ int esm_pt_start_timer(int pti, const OctetString *msg,
     ctx->args = (esm_pt_timer_data_t *)malloc(sizeof(esm_pt_timer_data_t));
 
     if (ctx->args) {
+      ctx->args->user = user;
       /* Set the EPS bearer identity */
       ctx->args->pti = pti;
       /* Reset the retransmission counter */
@@ -315,7 +316,6 @@ int esm_pt_start_timer(int pti, const OctetString *msg,
        * time interval */
       ctx->timer.id = nas_timer_start(sec, cb, ctx->args);
       ctx->timer.sec = sec;
-      // FIXME add user
     }
   }
 
diff --git a/openair3/NAS/UE/ESM/esm_pt.h b/openair3/NAS/UE/ESM/esm_pt.h
index df97b710d4bf45e876e2ced601f4688e735ef87a..ff76e598ca594a5fac3166017bb4d9d650660fa0 100755
--- a/openair3/NAS/UE/ESM/esm_pt.h
+++ b/openair3/NAS/UE/ESM/esm_pt.h
@@ -93,7 +93,7 @@ void esm_pt_initialize(void);
 int esm_pt_assign(void);
 int esm_pt_release(int pti);
 
-int esm_pt_start_timer(int pti, const OctetString *msg, long sec,
+int esm_pt_start_timer(nas_user_t *user, int pti, const OctetString *msg, long sec,
                        nas_timer_callback_t cb);
 int esm_pt_stop_timer(int pti);