diff --git a/include/SDL_hints.h b/include/SDL_hints.h
index 05e0cbeaa..7184b3dc7 100644
--- a/include/SDL_hints.h
+++ b/include/SDL_hints.h
@@ -76,6 +76,7 @@ extern "C" {
  *    "opengl"
  *    "opengles2"
  *    "opengles"
+ *    "metal"
  *    "software"
  *
  *  The default varies by platform, but it's the first one in the list that