diff --git a/llvm/utils/gn/secondary/clang/unittests/Serialization/BUILD.gn b/llvm/utils/gn/secondary/clang/unittests/Serialization/BUILD.gn
index ca29912d2f24..10a2fd262ff0 100644
--- a/llvm/utils/gn/secondary/clang/unittests/Serialization/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/unittests/Serialization/BUILD.gn
@@ -5,6 +5,7 @@ unittest("SerializationTests") {
   deps = [
     "//clang/lib/AST",
     "//clang/lib/Basic",
+    "//clang/lib/Frontend",
     "//clang/lib/Lex",
     "//clang/lib/Sema",
     "//clang/lib/Serialization",