diff --git a/man7/namespaces.7 b/man7/namespaces.7
index ddc2bb30e..6f816b5c6 100644
--- a/man7/namespaces.7
+++ b/man7/namespaces.7
@@ -197,6 +197,11 @@ then the device IDs and inode numbers of their
 .IR /proc/[pid]/ns/xxx
 symbolic links will be the same; an application can check this using the
 .I stat.st_dev
+.\" Eric Biederman: "I reserve the right for st_dev to be significant
+.\" when comparing namespaces."
+.\" https://lore.kernel.org/lkml/87poky5ca9.fsf@xmission.com/
+.\" Re: Documenting the ioctl interfaces to discover relationships...
+.\" Date: Mon, 12 Dec 2016 11:30:38 +1300
 and
 .I stat.st_ino
 fields returned by