Fix OpenBSD build.

Broken-by: 75c121f07a

diff --git a/src/OS/os.h-OpenBSD b/src/OS/os.h-OpenBSD
index 7998b175942a6c77a8dec36409ee1d99243b73b7..b09bd84bef9a41426f467942d4f2ea6422ee9db1 100644 (file)
--- a/src/OS/os.h-OpenBSD
+++ b/src/OS/os.h-OpenBSD
@@ -53,4 +53,7 @@ typedef struct __res_state *res_state;
 #endif
 #define TIME_T_FMT "%lld"
 
+/* seems arpa/nameser.h does not define this */
+#define NS_MAXMSG 16380
+
 /* End */