diff --git a/man7/unix.7 b/man7/unix.7
index 4b3e1ee2e..adbfd7961 100644
--- a/man7/unix.7
+++ b/man7/unix.7
@@ -12,7 +12,7 @@
 .\"     address that can appear in the sockaddr_un structure: pathname,
 .\"     unnamed, and abstract.
 .\"
-.TH UNIX  7 2011-09-15 "Linux" "Linux Programmer's Manual"
+.TH UNIX  7 2102-04-16 "Linux" "Linux Programmer's Manual"
 .SH NAME
 unix, AF_UNIX, AF_LOCAL \- Sockets for local
 interprocess communication
@@ -166,7 +166,10 @@ then the socket is autobound to an abstract address.
 The address consists of a null byte
 followed by 5 bytes in the character set
 .IR [0-9a-f] .
-(Thus, there is a limit of 2^20 autobind addresses.)
+Thus, there is a limit of 2^20 autobind addresses.
+(From Linux 2.1.15, when the autobind feature was added,
+8 bytes were used, and the limit was thus 2^32 autobind addresses.
+The change to 5 bytes came in Linux 2.3.15.)
 .SS Sockets API
 The following paragraphs describe domain-specific details and
 unsupported features of the sockets API for UNIX domain sockets on Linux.