diff --git a/rclcpp/include/rclcpp/node.hpp b/rclcpp/include/rclcpp/node.hpp
index e8a1273c63..bcca5a24b6 100644
--- a/rclcpp/include/rclcpp/node.hpp
+++ b/rclcpp/include/rclcpp/node.hpp
@@ -74,6 +74,7 @@ namespace rclcpp
 {
 
 /// Node is the single point of entry for creating publishers and subscribers.
+/// ABI test: this comment line has no effect on the compiled library.
 class Node : public std::enable_shared_from_this<Node>
 {
 public: