diff --git a/man2/getgid.2 b/man2/getgid.2
index a78babc68..45e9ad9b4 100644
--- a/man2/getgid.2
+++ b/man2/getgid.2
@@ -22,7 +22,7 @@
 .\" Formatted or processed versions of this manual, if unaccompanied by
 .\" the source, must acknowledge the copyright and authors of this work.
 .\"
-.TH GETGID 2 1993-07-23 "Linux" "Linux Programmer's Manual"
+.TH GETGID 2 2010-11-22 "Linux" "Linux Programmer's Manual"
 .SH NAME
 getgid, getegid \- get group identity
 .SH SYNOPSIS
@@ -43,6 +43,22 @@ returns the effective group ID of the calling process.
 These functions are always successful.
 .SH "CONFORMING TO"
 POSIX.1-2001, 4.3BSD.
+.SH NOTES
+The original Linux
+.BR getgid ()
+and
+.BR getegid ()
+system calls supported only 16-bit group IDs.
+Subsequently, Linux 2.4 added 
+.BR getgid32 ()
+and
+.BR getegid32 (),
+supporting 32-bit IDs.
+The glibc
+.BR getgid ()
+and
+.BR getegid ()
+wrapper functions transparently deal with the variations across kernel versions.
 .SH "SEE ALSO"
 .BR getresgid (2),
 .BR setgid (2),