diff --git a/.travis.yml b/.travis.yml
index 4edec7163a..b3f9ae2f1b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,5 @@
 # no installation...
+before-script: autoconf
 script: "configure && make all test"
 
 branches:
diff --git a/ChangeLog b/ChangeLog
index d9b7556439..6123cf7ee9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Nov 26 15:31:34 2011  URABE Shyouhei  <shyouhei@ruby-lang.org>
+
+	* .travis.yml (before-script): autoconf required.
+
 Sat Nov 26 15:24:05 2011  URABE Shyouhei  <shyouhei@ruby-lang.org>
 
 	* .travis.yml: Travis enable.