diff --git a/utils/gn/secondary/llvm/tools/llvm-dwp/BUILD.gn b/utils/gn/secondary/llvm/tools/llvm-dwp/BUILD.gn
index 110aaafb802..caa77e9a9fd 100644
--- a/utils/gn/secondary/llvm/tools/llvm-dwp/BUILD.gn
+++ b/utils/gn/secondary/llvm/tools/llvm-dwp/BUILD.gn
@@ -28,6 +28,7 @@ executable("llvm-dwp") {
     "//llvm/lib/Target:TargetsToBuild",
   ]
   sources = [
+    "DWP.cpp",
     "DWPError.cpp",
     "llvm-dwp.cpp",
   ]