diff --git a/man2/mincore.2 b/man2/mincore.2
index ebc9c0b87..7c2e210e1 100644
--- a/man2/mincore.2
+++ b/man2/mincore.2
@@ -26,6 +26,8 @@
 .\" Slightly adapted, following comments by Hugh Dickins, aeb, 2001-06-04.
 .\" Modified, 20 May 2003, Michael Kerrisk <mtk-manpages@gmx.net>
 .\" Modified, 30 Apr 2004, Michael Kerrisk <mtk-manpages@gmx.net>
+.\" 2005-04-05 mtk, Cleaned up description of EINVAL error,
+.\" 	after message from <gordon.jin@intel.com>
 .\"
 .TH MINCORE 2 2004-04-30 "Linux 2.6.5" "Linux Programmer's Manual"
 .SH NAME
@@ -86,7 +88,11 @@ points to an invalid address
 .I start
 is not a multiple of the page size, or
 .I len
-has a non-positive value
+is greater than
+.RI ( TASK_SIZE " - " start ).
+(The latter could occur if a negative value is specified for
+.IR len ,
+since that value will be interpreted as a large unsigned integer.)
 .TP
 .B ENOMEM
 .I address
@@ -95,7 +101,6 @@ to
 +
 .I length
 contained unmapped memory, or memory not part of a file.
-
 .SH BUGS
 Up to now (Linux 2.6.5),
 .B mincore
@@ -118,7 +123,8 @@ does not return correct information for MAP_PRIVATE mappings.
 .\" .BR ENOMEM .
 .SH "CONFORMING TO"
 .B mincore
-does not appear to be part of POSIX or the Single Unix Specification. 
+is not specified in POSIX.1-2001,
+and it is not available on all Unix implementations. 
 .SH HISTORY
 The mincore() function first appeared in 4.4BSD.
 .SH AVAILABILITY