diff --git a/ChangeLog b/ChangeLog
index 8ef472344d..6d32fc11c9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Sep 16 17:47:00 2012  Eric Hodel  <drbrain@segment7.net>
+
+	* tool/change_maker.rb:  Update svn detection for subversion 1.7's
+	  single .svn directory.
+
 Sun Sep 16 11:39:12 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* io.c (io_set_read_length): if the read length equals to the buffer
diff --git a/tool/change_maker.rb b/tool/change_maker.rb
index a4e44057fa..0ca195f77a 100755
--- a/tool/change_maker.rb
+++ b/tool/change_maker.rb
@@ -18,7 +18,7 @@ def diff2index(cmd, *argv)
   lines.empty? ? nil : lines
 end
 
-if File.directory?(".svn")
+if `svnversion` =~ /^\d+/
   cmd = "svn diff --diff-cmd=diff -x-pU0"
   change = diff2index(cmd, ARGV)
 elsif File.directory?(".git")