diff --git a/src/libcharon/encoding/payloads/notify_payload.c b/src/libcharon/encoding/payloads/notify_payload.c
old mode 100644
new mode 100755
index 6f3784219..5918eb426
--- a/src/libcharon/encoding/payloads/notify_payload.c
+++ b/src/libcharon/encoding/payloads/notify_payload.c
@@ -108,7 +108,10 @@ ENUM_NEXT(notify_type_names, INITIAL_CONTACT, IPSEC_REPLAY_COUNTER_SYNC, MS_NOTI
 	"IPSEC_REPLAY_COUNTER_SYNC");
 ENUM_NEXT(notify_type_names, INITIAL_CONTACT_IKEV1, INITIAL_CONTACT_IKEV1, IPSEC_REPLAY_COUNTER_SYNC,
 	"INITIAL_CONTACT");
-ENUM_NEXT(notify_type_names, USE_BEET_MODE, USE_BEET_MODE, INITIAL_CONTACT_IKEV1,
+ENUM_NEXT(notify_type_names, DPD_R_U_THERE, DPD_R_U_THERE_ACK, INITIAL_CONTACT_IKEV1,
+	"DPD_R_U_THERE",
+	"DPD_R_U_THERE_ACK");
+ENUM_NEXT(notify_type_names, USE_BEET_MODE, USE_BEET_MODE, DPD_R_U_THERE_ACK,
 	"USE_BEET_MODE");
 ENUM_NEXT(notify_type_names, ME_MEDIATION, ME_RESPONSE, USE_BEET_MODE,
 	"ME_MEDIATION",
@@ -485,6 +488,13 @@ METHOD(payload_t, verify, status_t,
 				bad_length = TRUE;
 			}
 			break;
+		case DPD_R_U_THERE:
+		case DPD_R_U_THERE_ACK:
+			if (this->notify_data.len != 4)
+			{
+				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
old mode 100644
new mode 100755
index d105cc21a..597962dd1
--- a/src/libcharon/encoding/payloads/notify_payload.h
+++ b/src/libcharon/encoding/payloads/notify_payload.h
@@ -140,6 +140,9 @@ enum notify_type_t {
 	IPSEC_REPLAY_COUNTER_SYNC = 16423,
 	/* IKEv1 initial contact */
 	INITIAL_CONTACT_IKEV1 = 24578,
+	/* IKEv1 DPD */
+	DPD_R_U_THERE = 36136,
+	DPD_R_U_THERE_ACK = 36137,
 	/* BEET mode, not even a draft yet. private use */
 	USE_BEET_MODE = 40961,
 	/* IKE-ME, private use */