diff --git a/man4/null.4 b/man4/null.4
index bbbb18d1d..516b966c7 100644
--- a/man4/null.4
+++ b/man4/null.4
@@ -61,6 +61,14 @@ chown root:root /dev/null /dev/zero
 .SH NOTES
 If these devices are not writable and readable for all users, many
 programs will act strangely.
+
+Since Linux 2.6.31,
+.\" commit 2b83868723d090078ac0e2120e06a1cc94dbaef0
+reads from
+.IR /dev/zero
+are interruptible by signals.
+(This change was made to help with bad latencies for large reads from
+.IR /dev/zero .)
 .SH SEE ALSO
 .BR chown (1),
 .BR mknod (1),