diff --git a/third_party/systemlibs/grpc.bazel.protobuf.bzl b/third_party/systemlibs/grpc.bazel.protobuf.bzl
index a59b2bd2155d6f35055e9c3925b90c31c68fc531..3eca97dc2311fb1b72e0105e07d3023aa9a5fd7e 100644
--- a/third_party/systemlibs/grpc.bazel.protobuf.bzl
+++ b/third_party/systemlibs/grpc.bazel.protobuf.bzl
@@ -128,8 +128,8 @@ def get_plugin_args(
     ]
 
 def _get_staged_proto_file(context, source_file):
-    if source_file.dirname == context.label.package or \
-       is_in_virtual_imports(source_file):
+    if (source_file.dirname == context.label.package or
+        is_in_virtual_imports(source_file)):
         return source_file
     else:
         copied_proto = context.actions.declare_file(source_file.basename)