diff --git a/llvm/utils/gn/secondary/llvm/lib/Transforms/Scalar/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Transforms/Scalar/BUILD.gn
index 5128e87e7728..3d000fa846b1 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Transforms/Scalar/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Transforms/Scalar/BUILD.gn
@@ -80,5 +80,6 @@ static_library("Scalar") {
     "StraightLineStrengthReduce.cpp",
     "StructurizeCFG.cpp",
     "TailRecursionElimination.cpp",
+    "WarnMissedTransforms.cpp",
   ]
 }