diff --git a/llvm/utils/gn/secondary/llvm/unittests/ADT/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/ADT/BUILD.gn
index c7ee1ad377ff5..0c58814c952a8 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/ADT/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/ADT/BUILD.gn
@@ -80,5 +80,6 @@ unittest("ADTTests") {
     "TinyPtrVectorTest.cpp",
     "TripleTest.cpp",
     "TwineTest.cpp",
+    "WaymarkingTest.cpp",
   ]
 }