diff --git a/ros2/example_12.md b/ros2/example_12.md
index 0da73b1..9b49cd5 100644
--- a/ros2/example_12.md
+++ b/ros2/example_12.md
@@ -209,7 +209,7 @@ class LocateArUcoTag(hm.HelloNode):
                     transform = self.tf_buffer.lookup_transform('base_link',
                                                             tag_name,
                                                             now)
-                    self.get_logger().info("Found Requested Tag: \n%s", transform)
+                    self.get_logger().info(f"Found Requested Tag: \n{transform}")
 
                     # Publish the transform
                     self.transform_pub.publish(transform)
@@ -455,4 +455,4 @@ def main():
         node.destroy_node()
         rclpy.shutdown()
 ```
-Instantiate the `LocateArUcoTag()` object and run the `main()` method.
\ No newline at end of file
+Instantiate the `LocateArUcoTag()` object and run the `main()` method.