diff --git a/utils/bazel/llvm-project-overlay/mlir/BUILD.bazel b/utils/bazel/llvm-project-overlay/mlir/BUILD.bazel
--- a/utils/bazel/llvm-project-overlay/mlir/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/mlir/BUILD.bazel
@@ -9850,6 +9850,7 @@
         ],
     ),
     hdrs = [
+        "include/mlir/Dialect/Arith/IR/Arith.h",
         "include/mlir/Dialect/MemRef/IR/MemRef.h",
         "include/mlir/Dialect/MemRef/Utils/MemRefUtils.h",
     ],