diff --git a/sys/man/6/ndb b/sys/man/6/ndb
index da1af6fc9..9289de21f 100644
--- a/sys/man/6/ndb
+++ b/sys/man/6/ndb
@@ -227,7 +227,7 @@ a TCP or UDP port number
 .TP
 .B restricted
 a TCP service that can be called only by ports numbered
-less that 1024
+less than 1024
 .TP
 .B proto
 a protocol supported by a host.