diff --git a/ChangeLog b/ChangeLog
index 9151dae6..6171be68 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-10-20 Tatsuhiro Tsujikawa  <tujikawa at rednoah dot com>
+
+	Included cstdlib. This fixed the compile error with g++-4.3.2.
+	* src/IteratableChecksumValidator.cc
+	* src/IteratableChunkChecksumValidator.cc
+
 2008-10-20 Tatsuhiro Tsujikawa  <tujikawa at rednoah dot com>
 
 	* Release 0.16.2
diff --git a/src/IteratableChecksumValidator.cc b/src/IteratableChecksumValidator.cc
index 1d9283a9..b250af4d 100644
--- a/src/IteratableChecksumValidator.cc
+++ b/src/IteratableChecksumValidator.cc
@@ -33,6 +33,9 @@
  */
 /* copyright --> */
 #include "IteratableChecksumValidator.h"
+
+#include <cstdlib>
+
 #include "Util.h"
 #include "message.h"
 #include "SingleFileDownloadContext.h"
diff --git a/src/IteratableChunkChecksumValidator.cc b/src/IteratableChunkChecksumValidator.cc
index f6420f34..dc03fc67 100644
--- a/src/IteratableChunkChecksumValidator.cc
+++ b/src/IteratableChunkChecksumValidator.cc
@@ -33,6 +33,11 @@
  */
 /* copyright --> */
 #include "IteratableChunkChecksumValidator.h"
+
+#include <cerrno>
+#include <cstring>
+#include <cstdlib>
+
 #include "Util.h"
 #include "message.h"
 #include "MessageDigestHelper.h"
@@ -46,8 +51,6 @@
 #include "Logger.h"
 #include "messageDigest.h"
 #include "StringFormat.h"
-#include <cerrno>
-#include <cstring>
 
 namespace aria2 {