diff --git a/src/evm.c b/src/evm.c
index 1451ffd..4c7be7e 100644
--- a/src/evm.c
+++ b/src/evm.c
@@ -180,7 +180,7 @@ int evrsrm_recv(EV_RSR_t *evrsr_request) {
     bpr->id = id;
     fmi->id = id;
 
-    asn_enc_rval_t enc = uper_encode_to_buffer(&asn_DEF_TransportRequest, NULL, tr, tr_oer, 1024);
+    asn_enc_rval_t enc = uper_encode_to_buffer(&asn_DEF_TransportRequest, NULL, tr, tr_oer + 1, 1023);
     if (enc.encoded == -1) {
         log_error("[ev] failed encoding transport request (%s)", enc.failed_type->name);
         rv = 1;