diff --git a/man7/tcp.7 b/man7/tcp.7
index d94cbebea..228c161ed 100644
--- a/man7/tcp.7
+++ b/man7/tcp.7
@@ -1016,6 +1016,8 @@ is returned.
 .B SIOCINQ
 is defined in
 .IR <linux/sockios.h> .
+.\" FIXME http://sources.redhat.com/bugzilla/show_bug.cgi?id=12002,
+.\" filed 2010-09-10, may cause SIOCINQ to be defined in glibc headers
 Alternatively,
 you can use the synonymous
 .BR FIONREAD ,
@@ -1065,6 +1067,8 @@ is returned.
 .B SIOCOUTQ
 is defined in
 .IR <linux/sockios.h> .
+.\" FIXME http://sources.redhat.com/bugzilla/show_bug.cgi?id=12002,
+.\" filed 2010-09-10, may cause SIOCOUTQ to be defined in glibc headers
 Alternatively,
 you can use the synonymous
 .BR TIOCOUTQ ,