diff --git a/src/net/transport.cpp b/src/net/transport.cpp
index 9a2db0ae..1e2936ce 100644
--- a/src/net/transport.cpp
+++ b/src/net/transport.cpp
@@ -32,7 +32,7 @@
 #include "vmime/utility/stream.hpp"
 #include "vmime/mailboxList.hpp"
 #include "vmime/message.hpp"
-#include "vmime/datetime.hpp"
+#include "vmime/dateTime.hpp"
 #include "vmime/messageId.hpp"
 
 #include "vmime/utility/outputStreamAdapter.hpp"
diff --git a/src/platforms/windows/windowsHandler.cpp b/src/platforms/windows/windowsHandler.cpp
index e399cb50..8bbfe37b 100644
--- a/src/platforms/windows/windowsHandler.cpp
+++ b/src/platforms/windows/windowsHandler.cpp
@@ -38,7 +38,7 @@
 #include <process.h>
 #include <windows.h>  // for winnls.h
 #include <winsock2.h> // for WSAStartup()
-#include <Ws2tcpip.h>
+#include <ws2tcpip.h>
 #include <wincrypt.h>
 
 #if VMIME_HAVE_MLANG