diff --git a/tools/run-mypy b/tools/run-mypy
index 72e9628926..6267de010f 100755
--- a/tools/run-mypy
+++ b/tools/run-mypy
@@ -41,7 +41,6 @@ exclude_py2 = []
 
 exclude_py3 = """
 zerver/lib/ccache.py
-zerver/management/commands/runtornado.py
 zerver/tests/test_i18n.py
 zerver/views/messages.py
 zerver/views/webhooks/beanstalk.py
diff --git a/zerver/management/commands/runtornado.py b/zerver/management/commands/runtornado.py
index 7ae7b368a4..e64059ca45 100644
--- a/zerver/management/commands/runtornado.py
+++ b/zerver/management/commands/runtornado.py
@@ -60,8 +60,8 @@ class Command(BaseCommand):
     def handle(self, addrport, **options):
         # type: (str, **bool) -> None
         # setup unbuffered I/O
-        sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
-        sys.stderr = os.fdopen(sys.stderr.fileno(), 'w', 0)
+        sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0) # type: ignore # https://github.com/python/typeshed/pull/337
+        sys.stderr = os.fdopen(sys.stderr.fileno(), 'w', 0) # type: ignore # https://github.com/python/typeshed/pull/337
         interactive_debug_listen()
 
         import django