diff --git a/src/platforms/windows/windowsHandler.cpp b/src/platforms/windows/windowsHandler.cpp
index ae4069de..d4027801 100644
--- a/src/platforms/windows/windowsHandler.cpp
+++ b/src/platforms/windows/windowsHandler.cpp
@@ -245,7 +245,7 @@ const vmime::string windowsHandler::getHostName() const
 	{
 		for (struct addrinfo* p = info ; p != NULL ; p = p->ai_next)
 		{
-			if (isFQDN(p->ai_canonname))
+			if (p->ai_canonname && isFQDN(p->ai_canonname))
 			{
 				const string ret(p->ai_canonname);
 				freeaddrinfo(info);