diff --git a/utils/gn/secondary/clang/lib/Driver/BUILD.gn b/utils/gn/secondary/clang/lib/Driver/BUILD.gn
index 04d483a12ee..ab29e6beba9 100644
--- a/utils/gn/secondary/clang/lib/Driver/BUILD.gn
+++ b/utils/gn/secondary/clang/lib/Driver/BUILD.gn
@@ -90,6 +90,7 @@ static_library("Driver") {
     "ToolChains/VEToolchain.cpp",
     "ToolChains/WebAssembly.cpp",
     "ToolChains/XCore.cpp",
+    "ToolChains/ZOS.cpp",
     "Types.cpp",
     "XRayArgs.cpp",
   ]