diff --git a/src/Controls.cpp b/src/Controls.cpp
index 97a237c..536868f 100644
--- a/src/Controls.cpp
+++ b/src/Controls.cpp
@@ -27,7 +27,7 @@
 using namespace ZeroTier;
 
 #ifdef __WINDOWS__
-#include <Windows.h>
+#include <windows.h>
 WSADATA wsaData;
 #endif
 
diff --git a/src/Events.hpp b/src/Events.hpp
index f36b221..da911fc 100644
--- a/src/Events.hpp
+++ b/src/Events.hpp
@@ -23,7 +23,7 @@
 #include "ZeroTierSockets.h"
 
 #ifdef __WINDOWS__
-#include <BaseTsd.h>
+#include <basetsd.h>
 #endif
 
 /* Macro substitutions to standardize state checking of service, node, callbacks, and TCP/IP
diff --git a/src/NodeService.cpp b/src/NodeService.cpp
index 30a4d7d..26c1964 100644
--- a/src/NodeService.cpp
+++ b/src/NodeService.cpp
@@ -28,9 +28,9 @@
 #include "VirtualTap.hpp"
 
 #if defined(__WINDOWS__)
-#include <ShlObj.h>
-#include <WinSock2.h>
-#include <Windows.h>
+#include <shlobj.h>
+#include <winsock2.h>
+#include <windows.h>
 #include <iphlpapi.h>
 #include <netioapi.h>
 #define stat _stat
diff --git a/src/NodeService.hpp b/src/NodeService.hpp
index 6e704dc..86be58a 100644
--- a/src/NodeService.hpp
+++ b/src/NodeService.hpp
@@ -44,7 +44,7 @@
 #define ZT_LOCAL_INTERFACE_CHECK_INTERVAL 60000
 
 #ifdef __WINDOWS__
-#include <Windows.h>
+#include <windows.h>
 #endif
 
 namespace ZeroTier {
diff --git a/src/VirtualTap.cpp b/src/VirtualTap.cpp
index 757832c..a13dcbd 100644
--- a/src/VirtualTap.cpp
+++ b/src/VirtualTap.cpp
@@ -37,7 +37,7 @@
 #include "VirtualTap.hpp"
 
 #if defined(__WINDOWS__)
-#include "Synchapi.h"
+#include "synchapi.h"
 
 #include <time.h>
 #endif