diff --git a/utils/gn/secondary/clang/lib/Tooling/Transformer/BUILD.gn b/utils/gn/secondary/clang/lib/Tooling/Transformer/BUILD.gn
index c1164073410..54620638b36 100644
--- a/utils/gn/secondary/clang/lib/Tooling/Transformer/BUILD.gn
+++ b/utils/gn/secondary/clang/lib/Tooling/Transformer/BUILD.gn
@@ -12,6 +12,7 @@ static_library("Transformer") {
   ]
   sources = [
     "RangeSelector.cpp",
+    "RewriteRule.cpp",
     "SourceCode.cpp",
     "SourceCodeBuilders.cpp",
     "Stencil.cpp",