diff --git a/deps/rabbitmq_auth_backend_oauth2/src/Elixir.RabbitMQ.CLI.Ctl.Commands.AddUaaKeyCommand.erl b/deps/rabbitmq_auth_backend_oauth2/src/Elixir.RabbitMQ.CLI.Ctl.Commands.AddUaaKeyCommand.erl
index 6b78f02340..357c24cbcd 100644
--- a/deps/rabbitmq_auth_backend_oauth2/src/Elixir.RabbitMQ.CLI.Ctl.Commands.AddUaaKeyCommand.erl
+++ b/deps/rabbitmq_auth_backend_oauth2/src/Elixir.RabbitMQ.CLI.Ctl.Commands.AddUaaKeyCommand.erl
@@ -26,7 +26,7 @@
 
 
 usage() ->
-    <<"add_uaa_key <name> [--json=<json_key>] [--pem=<public_key>] [--pem_file=<pem_file>]">>.
+    <<"add_uaa_key <name> [--json=<json_key>] [--pem=<public_key>] [--pem-file=<pem_file>]">>.
 
 switches() ->
     [{json, string},