1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/util/rlimit.py b/synapse/util/rlimit.py
index bf812ab516..06651e956d 100644
--- a/synapse/util/rlimit.py
+++ b/synapse/util/rlimit.py
@@ -18,7 +18,7 @@ import resource
 logger = logging.getLogger("synapse.app.homeserver")
 
 
-def change_resource_limit(soft_file_no):
+def change_resource_limit(soft_file_no: int) -> None:
     try:
         soft, hard = resource.getrlimit(resource.RLIMIT_NOFILE)