diff --git a/llvm/utils/gn/secondary/llvm/unittests/Support/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/Support/BUILD.gn
index 890f8a46e383ae..ffdf991f7e656c 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/Support/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/Support/BUILD.gn
@@ -36,6 +36,7 @@ unittest("SupportTests") {
     "ErrorOrTest.cpp",
     "ErrorTest.cpp",
     "ExtensibleRTTITest.cpp",
+    "FSUniqueIDTest.cpp",
     "FileCollectorTest.cpp",
     "FileOutputBufferTest.cpp",
     "FileUtilitiesTest.cpp",