diff --git a/llvm/utils/gn/secondary/clang/lib/Headers/BUILD.gn b/llvm/utils/gn/secondary/clang/lib/Headers/BUILD.gn
index cb95753f7e02bc..7860c2fe7c86e8 100644
--- a/llvm/utils/gn/secondary/clang/lib/Headers/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/lib/Headers/BUILD.gn
@@ -105,7 +105,6 @@ copy("Headers") {
     "avxintrin.h",
     "bmi2intrin.h",
     "bmiintrin.h",
-    "cet.h",
     "cetintrin.h",
     "cldemoteintrin.h",
     "clflushoptintrin.h",