diff --git a/include/boost/predef/os/bsd/open.h b/include/boost/predef/os/bsd/open.h
index 34f0a71..df1f3b6 100644
--- a/include/boost/predef/os/bsd/open.h
+++ b/include/boost/predef/os/bsd/open.h
@@ -13,7 +13,7 @@ Distributed under the Boost Software License, Version 1.0.
 /* tag::reference[]
 = `BOOST_OS_BSD_OPEN`
 
-http://en.wikipedia.org/wiki/Openbsd[OpenBSD] operating system.
+http://en.wikipedia.org/wiki/OpenBSD[OpenBSD] operating system.
 
 [options="header"]
 |===