diff --git a/sys/sys/types.h b/sys/sys/types.h
index ce9495adb8c..f2545bfc56a 100644
--- a/sys/sys/types.h
+++ b/sys/sys/types.h
@@ -136,7 +136,7 @@ typedef	_BSD_TIME_T_	time_t;
  * be enough for most uses.
  */
 #ifndef	FD_SETSIZE
-#define	FD_SETSIZE	256
+#define	FD_SETSIZE	1024
 #endif
 
 typedef long	fd_mask;