diff --git a/openair-cn/COMMON/s1ap_messages_def.h b/openair-cn/COMMON/s1ap_messages_def.h
index e228f1f0a0..2e39e264b2 100644
--- a/openair-cn/COMMON/s1ap_messages_def.h
+++ b/openair-cn/COMMON/s1ap_messages_def.h
@@ -45,3 +45,4 @@ MESSAGE_DEF(S1AP_ENB_DEREGISTERED_IND      , MESSAGE_PRIORITY_MED, s1ap_eNB_dere
 MESSAGE_DEF(S1AP_DEREGISTER_UE_REQ         , MESSAGE_PRIORITY_MED, s1ap_deregister_ue_req_t         , s1ap_deregister_ue_req)
 MESSAGE_DEF(S1AP_UE_CONTEXT_RELEASE_REQ    , MESSAGE_PRIORITY_MED, s1ap_ue_context_release_req_t    , s1ap_ue_context_release_req)
 MESSAGE_DEF(S1AP_UE_CONTEXT_RELEASE_COMMAND, MESSAGE_PRIORITY_MED, s1ap_ue_context_release_command_t, s1ap_ue_context_release_command)
+MESSAGE_DEF(S1AP_UE_CONTEXT_RELEASE_COMPLETE, MESSAGE_PRIORITY_MED, s1ap_ue_context_release_complete_t, s1ap_ue_context_release_complete)
diff --git a/openair-cn/COMMON/s1ap_messages_types.h b/openair-cn/COMMON/s1ap_messages_types.h
index c712277ba5..23ff59a858 100644
--- a/openair-cn/COMMON/s1ap_messages_types.h
+++ b/openair-cn/COMMON/s1ap_messages_types.h
@@ -33,6 +33,7 @@
 #define S1AP_DEREGISTER_UE_REQ(mSGpTR)      (mSGpTR)->ittiMsg.s1ap_deregister_ue_req
 #define S1AP_UE_CONTEXT_RELEASE_REQ(mSGpTR) (mSGpTR)->ittiMsg.s1ap_ue_context_release_req
 #define S1AP_UE_CONTEXT_RELEASE_COMMAND(mSGpTR) (mSGpTR)->ittiMsg.s1ap_ue_context_release_command
+#define S1AP_UE_CONTEXT_RELEASE_COMPLETE(mSGpTR) (mSGpTR)->ittiMsg.s1ap_ue_context_release_complete
 
 typedef struct s1ap_initial_ue_message_s {
   unsigned     eNB_ue_s1ap_id:24;
@@ -90,4 +91,8 @@ typedef struct s1ap_ue_context_release_command_s {
   uint32_t mme_ue_s1ap_id;
 } s1ap_ue_context_release_command_t;
 
+typedef struct s1ap_ue_context_release_complete_s {
+  uint32_t mme_ue_s1ap_id;
+} s1ap_ue_context_release_complete_t;
+
 #endif /* S1AP_MESSAGES_TYPES_H_ */