diff --git a/ChangeLog b/ChangeLog
index 9d825935..601f4191 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2010-11-10  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
+
+	Print IP protocol version when setting up XML-RPC server failed.
+	* src/HttpListenCommand.cc
+
 2010-11-10  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
 
 	Retry open(2) and fallocate(2) when they are interrupted by
diff --git a/src/HttpListenCommand.cc b/src/HttpListenCommand.cc
index 9fc167e1..52e5c0af 100644
--- a/src/HttpListenCommand.cc
+++ b/src/HttpListenCommand.cc
@@ -119,6 +119,8 @@ bool HttpListenCommand::bindPort(uint16_t port)
     e_->addSocketForReadCheck(serverSocket_, this);
     return true;
   } catch(RecoverableException& e) {
+    getLogger()->error("Failed to setup XML-RPC server for IPv%d",
+                       family_ == AF_INET?4:6);
     getLogger()->error(MSG_BIND_FAILURE, e,
                        util::itos(getCuid()).c_str(), port);
     if(!serverSocket_.isNull()) {