diff --git a/controller_manager/src/ros2_control_node.cpp b/controller_manager/src/ros2_control_node.cpp
index a8f8c079c3..75a98d19dd 100644
--- a/controller_manager/src/ros2_control_node.cpp
+++ b/controller_manager/src/ros2_control_node.cpp
@@ -61,10 +61,13 @@ int main(int argc, char ** argv)
 
   const bool has_realtime = realtime_tools::has_realtime_kernel();
   const bool lock_memory = cm->get_parameter_or<bool>("lock_memory", has_realtime);
-  std::string message;
-  if (lock_memory && !realtime_tools::lock_memory(message))
+  if (lock_memory)
   {
-    RCLCPP_WARN(cm->get_logger(), "Unable to lock the memory : '%s'", message.c_str());
+    const auto lock_result = realtime_tools::lock_memory();
+    if (!lock_result.first)
+    {
+      RCLCPP_WARN(cm->get_logger(), "Unable to lock the memory: '%s'", lock_result.second.c_str());
+    }
   }
 
   rclcpp::Parameter cpu_affinity_param;