diff --git a/utils/gn/secondary/llvm/tools/llvm-objcopy/BUILD.gn b/utils/gn/secondary/llvm/tools/llvm-objcopy/BUILD.gn
index 5b29a72..a23d1a3 100644
--- a/utils/gn/secondary/llvm/tools/llvm-objcopy/BUILD.gn
+++ b/utils/gn/secondary/llvm/tools/llvm-objcopy/BUILD.gn
@@ -50,6 +50,7 @@
   sources = [
     "Buffer.cpp",
     "COFF/COFFObjcopy.cpp",
+    "COFF/Object.cpp",
     "COFF/Reader.cpp",
     "COFF/Writer.cpp",
     "CopyConfig.cpp",