--- a/dom/media/platforms/wmf/WMFUtils.cpp
+++ b/dom/media/platforms/wmf/WMFUtils.cpp
@@ -9,18 +9,18 @@
 #include "mozilla/ArrayUtils.h"
 #include "mozilla/CheckedInt.h"
 #include "mozilla/Logging.h"
 #include "mozilla/RefPtr.h"
 #include "nsTArray.h"
 #include "nsThreadUtils.h"
 #include "nsWindowsHelpers.h"
 #include "prenv.h"
-#include <Shlobj.h>
-#include <Shlwapi.h>
+#include <shlobj.h>
+#include <shlwapi.h>
 #include <initguid.h>
 #include <stdint.h>
 #include "mozilla/mscom/EnsureMTA.h"
 #include "mozilla/WindowsVersion.h"
 
 #ifdef WMF_MUST_DEFINE_AAC_MFT_CLSID
 // Some SDK versions don't define the AAC decoder CLSID.
 // {32D186A7-218F-4C75-8876-DD77273A8999}