diff --git a/docs/building.md b/docs/building.md
index 610187cee..3072e057a 100644
--- a/docs/building.md
+++ b/docs/building.md
@@ -54,7 +54,7 @@ Build the Docker image with
 ```shell
 # Make sure to run this in the workspace directory
 # ROS_DISTRO can be humble|iron|rolling
-docker build -f src/ros2_rust/Dockerfile --build-arg "ROS_DISTRO=humble" -t ros2_rust_dev
+docker build -f src/ros2_rust/Dockerfile --build-arg "ROS_DISTRO=humble" -t ros2_rust_dev .
 ```
 
 and then run it with