--- third_party/usrsctp/BUILD.gn.orig	2022-02-07 13:39:41 UTC
+++ third_party/usrsctp/BUILD.gn
@@ -13,7 +13,7 @@ config("usrsctp_public_config") {
 
   # This is part of the public config because it's used both by usrsctp and
   # the client (WebRTC), to determine if the length field needs populating.
-  if (is_mac || is_ios || target_os == "freebsd") {
+  if (is_mac || is_ios || target_os == "freebsd" || target_os == "openbsd") {
     defines = [ "HAVE_SCONN_LEN" ]
   }
 }