diff --git a/gfx/thebes/gfxFontInfoLoader.cpp b/gfx/thebes/gfxFontInfoLoader.cpp
index c865f1abed..c9abef2ea3 100644
--- a/gfx/thebes/gfxFontInfoLoader.cpp
+++ b/gfx/thebes/gfxFontInfoLoader.cpp
@@ -9,7 +9,9 @@
 #include "nsThreadUtils.h"              // for nsRunnable
 #include "gfxPlatformFontList.h"
 #include "mozilla/gfx/Logging.h"
+#ifdef XP_WIN
 #include <d3d11.h>
+#endif
 
 using namespace mozilla;
 using services::GetObserverService;