diff --git a/mypy_protobuf/main.py b/mypy_protobuf/main.py
index 41ba3b11..05044050 100644
--- a/mypy_protobuf/main.py
+++ b/mypy_protobuf/main.py
@@ -708,7 +708,7 @@ def write_grpc_methods(self, service: d.ServiceDescriptorProto, scl_prefix: Sour
                 ") -> {}:{}",
                 self._output_type(method),
                 " ..." if not self._has_comments(scl) else "",
-            ),
+            )
             if self._has_comments(scl):
                 with self._indent():
                     if not self._write_comments(scl):