diff --git a/llvm/utils/gn/secondary/clang/lib/Tooling/Syntax/BUILD.gn b/llvm/utils/gn/secondary/clang/lib/Tooling/Syntax/BUILD.gn
index 45c1f4388c20..29eb3c2cc864 100644
--- a/llvm/utils/gn/secondary/clang/lib/Tooling/Syntax/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/lib/Tooling/Syntax/BUILD.gn
@@ -8,6 +8,9 @@ static_library("Syntax") {
     "//llvm/lib/Support",
   ]
   sources = [
+    "BuildTree.cpp",
+    "Nodes.cpp",
     "Tokens.cpp",
+    "Tree.cpp",
   ]
 }
diff --git a/llvm/utils/gn/secondary/clang/unittests/Tooling/Syntax/BUILD.gn b/llvm/utils/gn/secondary/clang/unittests/Tooling/Syntax/BUILD.gn
index d78cf5700b28..0449e6e5cf66 100644
--- a/llvm/utils/gn/secondary/clang/unittests/Tooling/Syntax/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/unittests/Tooling/Syntax/BUILD.gn
@@ -16,5 +16,6 @@ unittest("SyntaxTests") {
   ]
   sources = [
     "TokensTest.cpp",
+    "TreeTest.cpp",
   ]
 }