diff --git a/utils/gn/secondary/clang/lib/Tooling/DependencyScanning/BUILD.gn b/utils/gn/secondary/clang/lib/Tooling/DependencyScanning/BUILD.gn
index 93c18cbf1ca..f0b2cf129a9 100644
--- a/utils/gn/secondary/clang/lib/Tooling/DependencyScanning/BUILD.gn
+++ b/utils/gn/secondary/clang/lib/Tooling/DependencyScanning/BUILD.gn
@@ -17,6 +17,7 @@ static_library("DependencyScanning") {
   sources = [
     "DependencyScanningFilesystem.cpp",
     "DependencyScanningService.cpp",
+    "DependencyScanningTool.cpp",
     "DependencyScanningWorker.cpp",
   ]
 }