diff --git a/sys/netinet/sctp_uio.h b/sys/netinet/sctp_uio.h
index 5356ec84f860..f19e3b9e0ff6 100644
--- a/sys/netinet/sctp_uio.h
+++ b/sys/netinet/sctp_uio.h
@@ -608,13 +608,6 @@ struct sctp_getaddresses {
 	struct sockaddr addr[1];
 };
 
-struct sctp_setstrm_timeout {
-	sctp_assoc_t ssto_assoc_id;
-	uint32_t ssto_timeout;
-	uint32_t ssto_streamid_start;
-	uint32_t ssto_streamid_end;
-};
-
 struct sctp_status {
 	sctp_assoc_t sstat_assoc_id;
 	int32_t sstat_state;