diff --git a/ChangeLog b/ChangeLog
index 52425b46..bb084a17 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2010-03-08  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
+
+	Fixed unit test error with mingw32 build.
+	* test/LpdMessageReceiverTest.cc
+
 2010-03-08  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
 
 	Updated automake-1.11.1
diff --git a/test/LpdMessageReceiverTest.cc b/test/LpdMessageReceiverTest.cc
index 923a4d82..3b536de0 100644
--- a/test/LpdMessageReceiverTest.cc
+++ b/test/LpdMessageReceiverTest.cc
@@ -33,6 +33,8 @@ void LpdMessageReceiverTest::testReceiveMessage()
 
   SharedHandle<SocketCore> sendsock(new SocketCore(SOCK_DGRAM));
   sendsock->create(AF_INET);
+  // Mingw32 build needs to set interface explicitly.
+  sendsock->setMulticastInterface("");
   sendsock->setMulticastTtl(0);
 
   std::string infoHashString = "cd41c7fdddfd034a15a04d7ff881216e01c4ceaf";