diff --git a/indra/media_plugins/cef/windows_volume_catcher.cpp b/indra/media_plugins/cef/windows_volume_catcher.cpp
index 6953ad3ab8..7a36123a11 100644
--- a/indra/media_plugins/cef/windows_volume_catcher.cpp
+++ b/indra/media_plugins/cef/windows_volume_catcher.cpp
@@ -27,8 +27,9 @@
  */
 
 #include "volume_catcher.h"
-#include <windows.h>
 #include "llsingleton.h"
+#include <windows.h>
+#include <mmeapi.h>
 class VolumeCatcherImpl : public LLSingleton<VolumeCatcherImpl>
 {
 	LLSINGLETON(VolumeCatcherImpl);