diff --git a/src/remote/blockingUDPTransport.cpp b/src/remote/blockingUDPTransport.cpp
index 2feb02d..4ec1456 100644
--- a/src/remote/blockingUDPTransport.cpp
+++ b/src/remote/blockingUDPTransport.cpp
@@ -6,7 +6,7 @@
 
 #ifdef _WIN32
 // needed for ip_mreq
-#include <Ws2tcpip.h>
+#include <ws2tcpip.h>
 #endif
 
 #include <pv/blockingUDP.h>