diff --git a/src/libcharon/encoding/payloads/notify_payload.c b/src/libcharon/encoding/payloads/notify_payload.c
index 2952ed06a..bf140e870 100644
--- a/src/libcharon/encoding/payloads/notify_payload.c
+++ b/src/libcharon/encoding/payloads/notify_payload.c
@@ -122,9 +122,10 @@ ENUM_NEXT(notify_type_names, USE_PPK, INTERMEDIATE_EXCHANGE_SUPPORTED, SIGNATURE
 	"PPK_IDENTITY",
 	"NO_PPK_AUTH",
 	"INTERMEDIATE_EXCHANGE_SUPPORTED");
-ENUM_NEXT(notify_type_names, ADDITIONAL_KEY_EXCHANGE, ADDITIONAL_KEY_EXCHANGE, INTERMEDIATE_EXCHANGE_SUPPORTED,
-	"ADDITIONAL_KEY_EXCHANGE");
-ENUM_NEXT(notify_type_names, SA_RESOURCE_INFO, SA_RESOURCE_INFO, ADDITIONAL_KEY_EXCHANGE,
+ENUM_NEXT(notify_type_names, ADDITIONAL_KEY_EXCHANGE, USE_AGGFRAG, INTERMEDIATE_EXCHANGE_SUPPORTED,
+	"ADDITIONAL_KEY_EXCHANGE",
+	"USE_AGGFRAG");
+ENUM_NEXT(notify_type_names, SA_RESOURCE_INFO, SA_RESOURCE_INFO, USE_AGGFRAG,
 	"SA_RESOURCE_INFO");
 ENUM_NEXT(notify_type_names, INITIAL_CONTACT_IKEV1, INITIAL_CONTACT_IKEV1, SA_RESOURCE_INFO,
 	"INITIAL_CONTACT");
@@ -244,9 +245,10 @@ ENUM_NEXT(notify_type_short_names, USE_PPK, INTERMEDIATE_EXCHANGE_SUPPORTED, SIG
 	"PPK_ID",
 	"NO_PPK",
 	"IKE_INT_SUP");
-ENUM_NEXT(notify_type_short_names, ADDITIONAL_KEY_EXCHANGE, ADDITIONAL_KEY_EXCHANGE, INTERMEDIATE_EXCHANGE_SUPPORTED,
-	"ADD_KE");
-ENUM_NEXT(notify_type_short_names, SA_RESOURCE_INFO, SA_RESOURCE_INFO, ADDITIONAL_KEY_EXCHANGE,
+ENUM_NEXT(notify_type_short_names, ADDITIONAL_KEY_EXCHANGE, USE_AGGFRAG, INTERMEDIATE_EXCHANGE_SUPPORTED,
+	"ADD_KE",
+	"AGGFRAG");
+ENUM_NEXT(notify_type_short_names, SA_RESOURCE_INFO, SA_RESOURCE_INFO, USE_AGGFRAG,
 	"RES_INFO");
 ENUM_NEXT(notify_type_short_names, INITIAL_CONTACT_IKEV1, INITIAL_CONTACT_IKEV1, SA_RESOURCE_INFO,
 	"INITIAL_CONTACT");
@@ -560,6 +562,12 @@ METHOD(payload_t, verify, status_t,
 				bad_length = TRUE;
 			}
 			break;
+		case USE_AGGFRAG:
+			if (this->notify_data.len != 1)
+			{
+				bad_length = TRUE;
+			}
+			break;
 		default:
 			/* TODO: verify */
 			break;
diff --git a/src/libcharon/encoding/payloads/notify_payload.h b/src/libcharon/encoding/payloads/notify_payload.h
index 9e90d423f..a7b1367ef 100644
--- a/src/libcharon/encoding/payloads/notify_payload.h
+++ b/src/libcharon/encoding/payloads/notify_payload.h
@@ -171,6 +171,8 @@ enum notify_type_t {
 
 	/* multiple key exchanges, RFC 9370 */
 	ADDITIONAL_KEY_EXCHANGE = 16441,
+	/* IP-TFS/AGGFRAG, RFC 9347 */
+	USE_AGGFRAG = 16442,
 
 	/* Resource info for CHILD_SAs, RFC 9611 */
 	SA_RESOURCE_INFO = 16444,