diff --git a/classes/ros_component.bbclass b/classes/ros_component.bbclass
index e207d9f..89e6681 100644
--- a/classes/ros_component.bbclass
+++ b/classes/ros_component.bbclass
@@ -7,6 +7,7 @@ export ROS_VERSION
 export ROS_PYTHON_VERSION
 
 ROS_BPN ??= "${@d.getVar('BPN', True).replace('-', '_')}"
+ROS_CN ??= "${ROS_BPN}"
 ROS_SPN ??= "${ROS_BPN}"
 ROS_SP ??= "${ROS_SPN}-${PV}"