diff --git a/instructions_custom_topics.md b/instructions_custom_topics.md
index 26adfd9..4a64dd6 100644
--- a/instructions_custom_topics.md
+++ b/instructions_custom_topics.md
@@ -50,7 +50,7 @@ This will result in an empty package structure:
 ### 1. Create CMake Package
 * Move to your colcon workspace's src directory: `cd <workspace_path>/src`
 * (For example: `cd ~/colcon_ws/src`)
-* Create CMake package: `ros2 pkg create --build-type ament_cmake <package_name>
+* Create CMake package: `ros2 pkg create --build-type ament_cmake <package_name>`
 * (Here: `ros2 pkg create --build-type ament_cmake pubsub_msg`)