diff --git a/ChangeLog b/ChangeLog
index 45060354..7840ed29 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2009-02-09  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
+
+	Included fstream instead of iostream.
+	* test/SignatureTest.cc
+
 2009-02-08  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
 
 	Removed #include <algorithm>
diff --git a/test/SignatureTest.cc b/test/SignatureTest.cc
index 03a90898..e2638605 100644
--- a/test/SignatureTest.cc
+++ b/test/SignatureTest.cc
@@ -1,8 +1,11 @@
 #include "Signature.h"
+
+#include <fstream>
+
+#include <cppunit/extensions/HelperMacros.h>
+
 #include "Exception.h"
 #include "File.h"
-#include <iostream>
-#include <cppunit/extensions/HelperMacros.h>
 
 namespace aria2 {