diff --git a/man2/umount.2 b/man2/umount.2
index b0f483547..86fff50a7 100644
--- a/man2/umount.2
+++ b/man2/umount.2
@@ -27,7 +27,7 @@
 .\" 2008-10-06, mtk: Created this as a new page by splitting
 .\"     umount/umount2 material out of mount.2
 .\"
-.TH UMOUNT 2 2010-06-19 "Linux" "Linux Programmer's Manual"
+.TH UMOUNT 2 2014-02-26 "Linux" "Linux Programmer's Manual"
 .SH NAME
 umount, umount2 \- unmount filesystem
 .SH SYNOPSIS
@@ -136,6 +136,11 @@ and either
 or
 .BR MNT_FORCE .
 .TP
+.BR EINVAL " (since Linux 2.6.34)"
+.BR umount2 ()
+was called with an invalid flag value in
+.IR flags .
+.TP
 .B ENAMETOOLONG
 A pathname was longer than
 .BR MAXPATHLEN .