diff --git a/ChangeLog b/ChangeLog
index 069b389f8e..e01f5a70ff 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue May 14 23:43:05 2013  Tanaka Akira  <akr@fsij.org>
+
+	* ext/socket/.document: Add ifaddr.c.
+
 Tue May 14 23:24:31 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/socket/extconf.rb: check for if_nametoindex() for
diff --git a/ext/socket/.document b/ext/socket/.document
index 0216c5aa45..53cfac0b10 100644
--- a/ext/socket/.document
+++ b/ext/socket/.document
@@ -2,6 +2,7 @@ ancdata.c
 basicsocket.c
 constants.c
 constdefs.c
+ifaddr.c
 init.c
 ipsocket.c
 option.c