diff --git a/llvm/utils/gn/secondary/llvm/unittests/ADT/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/ADT/BUILD.gn
index 0695d5d6913528..8183cbf0c04c85 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/ADT/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/ADT/BUILD.gn
@@ -15,6 +15,7 @@ unittest("ADTTests") {
     "APSIntTest.cpp",
     "AnyTest.cpp",
     "ArrayRefTest.cpp",
+    "BitFieldsTest.cpp",
     "BitVectorTest.cpp",
     "BitmaskEnumTest.cpp",
     "BreadthFirstIteratorTest.cpp",