diff --git a/loader/loader.c b/loader/loader.c
index 871095d..6b69e3a 100644
--- a/loader/loader.c
+++ b/loader/loader.c
@@ -66,9 +66,9 @@
 #include "murmurhash.h"
 
 #if defined(_WIN32)
-#include <Cfgmgr32.h>
+#include <cfgmgr32.h>
 #include <initguid.h>
-#include <Devpkey.h>
+#include <devpkey.h>
 #include <winternl.h>
 #include <d3dkmthk.h>
 
diff --git a/loader/vk_loader_platform.h b/loader/vk_loader_platform.h
index c697293..2ffda55 100644
--- a/loader/vk_loader_platform.h
+++ b/loader/vk_loader_platform.h
@@ -25,7 +25,7 @@
 
 #if defined(_WIN32)
 // WinSock2.h must be included *BEFORE* windows.h
-#include <WinSock2.h>
+#include <winsock2.h>
 #endif  // _WIN32
 
 #include "vulkan/vk_platform.h"