diff --git a/llvm/utils/gn/secondary/llvm/unittests/ADT/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/ADT/BUILD.gn
index 3cfebdcd674f5..c7ee1ad377ff5 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/ADT/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/ADT/BUILD.gn
@@ -19,6 +19,7 @@ unittest("ADTTests") {
     "BitmaskEnumTest.cpp",
     "BreadthFirstIteratorTest.cpp",
     "BumpPtrListTest.cpp",
+    "CoalescingBitVectorTest.cpp",
     "DAGDeltaAlgorithmTest.cpp",
     "DeltaAlgorithmTest.cpp",
     "DenseMapTest.cpp",