diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index e6ba5a243..73e7134a8 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,7 @@
+2010-10-18   Marco Atzeri  <marco_atzeri@yahoo.it>
+
+	* winsup/cygwin/cygwin.din: Add llround and llroundf.
+
 2010-10-09  John Carey  <aeolus@electric-cloud.com>
 	    Corinna Vinschen  <corinna@vinschen.de>
 
diff --git a/winsup/cygwin/cygwin.din b/winsup/cygwin/cygwin.din
index ba875454c..4de550fcc 100644
--- a/winsup/cygwin/cygwin.din
+++ b/winsup/cygwin/cygwin.din
@@ -960,6 +960,8 @@ llistxattr SIGFE
 llrint = _f_llrint NOSIGFE
 llrintf = _f_llrintf NOSIGFE
 llrintl = _f_llrintl NOSIGFE
+llround NOSIGFE
+llroundf NOSIGFE
 __locale_mb_cur_max NOSIGFE
 localeconv NOSIGFE
 _localeconv = localeconv NOSIGFE