diff --git a/tools/migration/BUILD b/tools/migration/BUILD
index 8eb7a10..1a3d1f3 100644
--- a/tools/migration/BUILD
+++ b/tools/migration/BUILD
@@ -27,6 +27,7 @@
     deps = [
         ":legacy_fields_migration_lib",
         "//third_party/com/github/bazelbuild/bazel/src/main/protobuf:crosstool_config_py_pb2",
+        "//third_party/py/google/protobuf:use_fast_cpp_protos",
         "@io_abseil_py//absl:app",
         "@io_abseil_py//absl/flags",
     ],
@@ -56,6 +57,7 @@
     python_version = "PY3",
     deps = [
         "//third_party/com/github/bazelbuild/bazel/src/main/protobuf:crosstool_config_py_pb2",
+        "//third_party/py/google/protobuf:use_fast_cpp_protos",
         "@io_abseil_py//absl:app",
         "@io_abseil_py//absl/flags",
     ],
@@ -68,6 +70,7 @@
     deps = [
         ":ctoolchain_comparator_lib",
         "//third_party/com/github/bazelbuild/bazel/src/main/protobuf:crosstool_config_py_pb2",
+        "//third_party/py/google/protobuf:use_fast_cpp_protos",
         "@io_abseil_py//absl:app",
         "@io_abseil_py//absl/flags",
     ],