diff --git a/man7/unix.7 b/man7/unix.7
index 89dada0ba..9bb2443f0 100644
--- a/man7/unix.7
+++ b/man7/unix.7
@@ -322,13 +322,15 @@ The
 .B MSG_MORE
 flag is not supported by UNIX domain sockets.
 
-The use of
+Before Linux 3.4,
+.\" commit 9f6f9af7694ede6314bed281eec74d588ba9474f
+the use of
 .B MSG_TRUNC
 in the
 .I flags
 argument of
 .BR recv (2)
-is not supported by UNIX domain sockets.
+was not supported by UNIX domain sockets.
 
 The
 .B SO_SNDBUF