diff --git a/man2/sigaction.2 b/man2/sigaction.2
index 48ea28b82..a675e9377 100644
--- a/man2/sigaction.2
+++ b/man2/sigaction.2
@@ -42,7 +42,7 @@
 .\" 2010-06-11 Andi Kleen, add hwpoison signal extensions
 .\" 2010-06-11 mtk, improvements to discussion of various siginfo_t fields.
 .\"
-.TH SIGACTION 2 2012-09-23 "Linux" "Linux Programmer's Manual"
+.TH SIGACTION 2 2013-01-22 "Linux" "Linux Programmer's Manual"
 .SH NAME
 sigaction \- examine and change a signal action
 .SH SYNOPSIS
@@ -61,6 +61,9 @@ Feature Test Macro Requirements for glibc (see
 .ad l
 .BR sigaction ():
 _POSIX_C_SOURCE\ >=\ 1 || _XOPEN_SOURCE || _POSIX_SOURCE
+
+.IR siginfo_t :
+_POSIX_C_SOURCE >= 199309L
 .ad b
 .SH DESCRIPTION
 The