diff --git a/ros2interface/ros2interface/command/interface.py b/ros2interface/ros2interface/command/interface.py
index 1f75e0074..981519448 100644
--- a/ros2interface/ros2interface/command/interface.py
+++ b/ros2interface/ros2interface/command/interface.py
@@ -18,6 +18,7 @@
 
 
 class InterfaceCommand(CommandExtension):
+    """Show information about ROS interfaces."""
 
     def add_arguments(self, parser, cli_name):
         self._subparser = parser