diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 8251cdcb4..b6f6e305e 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,7 @@
+2008-04-02  Corinna Vinschen  <corinna@vinschen.de>
+
+	* posix.sgml: Change lockf to being implemented.
+
 2008-04-02  Corinna Vinschen  <corinna@vinschen.de>
 
 	* dcrt0.cc (insert_file): Convert filename to WCHAR and call
diff --git a/winsup/cygwin/posix.sgml b/winsup/cygwin/posix.sgml
index ff845613b..7a9652102 100644
--- a/winsup/cygwin/posix.sgml
+++ b/winsup/cygwin/posix.sgml
@@ -353,6 +353,7 @@ also ISO/IEC 9945:2003 and IEEE Std 1003.1-2001 (POSIX.1-2001).</para>
     localeconv
     localtime
     localtime_r
+    lockf
     log
     log10
     log10f
@@ -1195,7 +1196,6 @@ also ISO/IEC 9945:2003 and IEEE Std 1003.1-2001 (POSIX.1-2001).</para>
     llround
     llroundf
     llroundl
-    lockf
     log10l
     log1pl
     log2l