diff --git a/man2/madvise.2 b/man2/madvise.2
index 6b32a01ef..6e713f911 100644
--- a/man2/madvise.2
+++ b/man2/madvise.2
@@ -46,7 +46,16 @@ Feature Test Macro Requirements for glibc (see
 .in
 .sp
 .BR madvise ():
+.PD 0
+.RS 4
+.TP 4
+Since glibc 2.19:
+_DEFAULT_SOURCE
+.TP
+Up to and including glibc 2.19:
 _BSD_SOURCE
+.RE
+.PD
 .SH DESCRIPTION
 The
 .BR madvise ()