diff --git a/src/custom_interfaces/Readme.md b/src/custom_interfaces/Readme.md
index 44c403c..2e8883f 100644
--- a/src/custom_interfaces/Readme.md
+++ b/src/custom_interfaces/Readme.md
@@ -24,7 +24,7 @@ rosidl_generate_interfaces(${PROJECT_NAME}
 Move back to the root of your _colcon_ workspace and rebuild it: `colcon build --symlink-install`  
 It should build without any errors. If you encounter errors fix these before continuing.
 
-After a successful build you must __close and reopen all terminals__ in order to source the newly built workspace. For this to happen you must have edited _.bashrc_ and added your current workspace (`sudo nano ~/.bashrc` and follow [this instruction](None)).
+After a successful build you must __close and reopen all terminals__ in order to source the newly built workspace. For this to happen you must have edited _.bashrc_ and added your current workspace (`sudo nano ~/.bashrc` and follow [this example](https://egit.irs.uni-stuttgart.de/RoverLehre/ROS2_pubsub/src/branch/master/non-ros-files/bashrc_overlay.bash)).
 
 ## 4. Import interfaces
 Import the newly created interfaces into the Python scripts. These scripts must be located in _Python packages_ inside the same workspace (or another _sourced_ workspace):