diff --git a/generator/src/lib.rs b/generator/src/lib.rs
index e7015f3..2b897af 100644
--- a/generator/src/lib.rs
+++ b/generator/src/lib.rs
@@ -1463,6 +1463,7 @@ pub fn variant_ident(enum_name: &str, variant_name: &str) -> Ident {
         "_KHX",
         "_LUNARG",
         "_MESA",
+        "_MSFT",
         "_MVK",
         "_NN",
         "_NV",