diff --git a/demo_nodes_cpp/src/topics/listener_serialized_message.cpp b/demo_nodes_cpp/src/topics/listener_serialized_message.cpp
index 005ea0f3d..98f8b1177 100644
--- a/demo_nodes_cpp/src/topics/listener_serialized_message.cpp
+++ b/demo_nodes_cpp/src/topics/listener_serialized_message.cpp
@@ -40,7 +40,7 @@ class SerializedMessageListener : public rclcpp::Node
     // message to the callback. We can then further deserialize it and convert it into
     // a ros2 compliant message.
     auto callback =
-      [](const std::shared_ptr<rclcpp::SerializedMessage> msg) -> void
+      [](const std::shared_ptr<const rclcpp::SerializedMessage> msg) -> void
       {
         // Print the serialized data message in HEX representation
         // This output corresponds to what you would see in e.g. Wireshark
diff --git a/pendulum_control/src/pendulum_logger.cpp b/pendulum_control/src/pendulum_logger.cpp
index ccdef93b3..2776176e9 100644
--- a/pendulum_control/src/pendulum_logger.cpp
+++ b/pendulum_control/src/pendulum_logger.cpp
@@ -34,7 +34,7 @@ int main(int argc, char * argv[])
   auto logger_node = rclcpp::Node::make_shared("pendulum_logger");
 
   auto logging_callback =
-    [](const pendulum_msgs::msg::RttestResults::SharedPtr msg) {
+    [](const pendulum_msgs::msg::RttestResults::ConstSharedPtr msg) {
       printf("Commanded motor angle: %f\n", msg->command.position);
       printf("Actual motor angle: %f\n", msg->state.position);