diff --git a/man2/fcntl.2 b/man2/fcntl.2
index 18e8d2632..528ce200a 100644
--- a/man2/fcntl.2
+++ b/man2/fcntl.2
@@ -58,7 +58,7 @@
 .\" 2010-06-17, Michael Kerrisk
 .\"	Document F_SETPIPE_SZ and F_GETPIPE_SZ.
 .\"
-.TH FCNTL 2 2010-11-01 "Linux" "Linux Programmer's Manual"
+.TH FCNTL 2 2010-11-20 "Linux" "Linux Programmer's Manual"
 .SH NAME
 fcntl \- manipulate file descriptor
 .SH SYNOPSIS
@@ -1184,6 +1184,28 @@ macro to obtain these definitions.)
 .\" .PP
 .\" SVr4 documents additional EIO, ENOLINK and EOVERFLOW error conditions.
 .SH NOTES
+The original Linux
+.BR fcntl ()
+system call was not designed to handle large file offsets
+(in the
+.I flock
+structure).
+Consequently,
+an
+.BR fcntl64 ()
+system call was added in Linux 2.4.
+The newer system call employs a different structure for file locking,
+.IR flock64 ,
+and corresponding commands,
+.BR F_GETLK64 ,
+.BR F_SETLK64 ,
+and
+.BR F_SETLKW64 .
+However, these details can be ignored by applications using glibc, whose
+.BR fcntl ()
+wrapper function transparently employs the more recent system call
+where it is available.
+
 The errors returned by
 .BR dup2 (2)
 are different from those returned by