diff --git a/llvm/utils/gn/secondary/llvm/lib/Support/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Support/BUILD.gn
index fad971b3338ae0..a235eb7d9101eb 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Support/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Support/BUILD.gn
@@ -78,7 +78,6 @@ static_library("Support") {
     "FoldingSet.cpp",
     "FormatVariadic.cpp",
     "FormattedStream.cpp",
-    "GenericDomTree.cpp",
     "GlobPattern.cpp",
     "GraphWriter.cpp",
     "Hashing.cpp",