diff --git a/src/libcharon/encoding/payloads/proposal_substructure.c b/src/libcharon/encoding/payloads/proposal_substructure.c
old mode 100644
new mode 100755
index f758d1fbe..ca36206cb
--- a/src/libcharon/encoding/payloads/proposal_substructure.c
+++ b/src/libcharon/encoding/payloads/proposal_substructure.c
@@ -1235,7 +1235,7 @@ proposal_substructure_t *proposal_substructure_create_from_proposal_v1(
 			break;
 		case PROTO_ESP:
 			set_from_proposal_v1_esp(this, proposal, lifetime,
-									 lifebytes, mode, udp, 0);
+									 lifebytes, mode, udp, proposal->get_number(proposal));
 			break;
 		default:
 			break;