diff --git a/MobileGL/Includes.h b/MobileGL/Includes.h
index 77fdb723..9da3de4c 100644
--- a/MobileGL/Includes.h
+++ b/MobileGL/Includes.h
@@ -101,6 +101,8 @@
 #define VK_USE_PLATFORM_ANDROID_KHR
 #elif _WIN32
 #define VK_USE_PLATFORM_WIN32_KHR
+#elif defined(__APPLE__)
+#define VK_USE_PLATFORM_METAL_EXT
 #else
 #warning "VK_USE_PLATFORM_*_KHR not defined for this platform!"
 #endif