diff --git a/src/win.h b/src/win.h
index 0c3a223..b4246a9 100644
--- a/src/win.h
+++ b/src/win.h
@@ -24,9 +24,9 @@
 #pragma warning(push, 1)
 #endif
 
-#include <WS2tcpip.h>
-#include <WinSock2.h>
-#include <Windows.h>
+#include <ws2tcpip.h>
+#include <winsock2.h>
+#include <windows.h>
 
 #ifndef __GNUC__
 #pragma warning(pop)