diff --git a/CMakeLists.txt b/CMakeLists.txt
index 54ba1acc..dc39a641 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -226,7 +226,7 @@ if (NRI_ENABLE_VK_SUPPORT)
     if (WIN32)
         target_compile_definitions (NRI_VK PRIVATE VK_USE_PLATFORM_WIN32_KHR)
     elseif (APPLE)
-        target_compile_definitions (NRI_VK PRIVATE VK_USE_PLATFORM_METAL_EXT)
+        target_compile_definitions (NRI_VK PRIVATE VK_USE_PLATFORM_METAL_EXT VK_ENABLE_BETA_EXTENSIONS)
     else ()
         if (NRI_ENABLE_XLIB_SUPPORT)
             find_path (XLIB_HEADERS NAMES "X11/Xlib.h")