diff --git a/btcpp_ros2_samples/src/subscriber_test.cpp b/btcpp_ros2_samples/src/subscriber_test.cpp
index 648fcce..fc9112f 100644
--- a/btcpp_ros2_samples/src/subscriber_test.cpp
+++ b/btcpp_ros2_samples/src/subscriber_test.cpp
@@ -17,11 +17,11 @@ class ReceiveString: public RosTopicSubNode<std_msgs::msg::String>
     return {};
   }
 
-  NodeStatus onTick(const std::shared_ptr<std_msgs::msg::String>& last_msg) override
+  NodeStatus onTick(const std::shared_ptr<std_msgs::msg::String> last_msg) override
   {
     if(last_msg) // empty if no new message received, since the last tick
     {
-      RCLCPP_INFO(logger(), "New message: %s",  last_msg->data.c_str());   
+      RCLCPP_INFO(logger(), "New message: %s",  last_msg->data.c_str());
     }
     return NodeStatus::SUCCESS;
   }
@@ -60,4 +60,4 @@ int main(int argc, char **argv)
   }
 
   return 0;
-}
\ No newline at end of file
+}