diff --git a/guides/diy.rst b/guides/diy.rst
index 7964daf17..4ff47aed7 100644
--- a/guides/diy.rst
+++ b/guides/diy.rst
@@ -60,7 +60,7 @@ Custom Components & Code
 - `ESPHome <-> Homebridge <https://www.npmjs.com/package/homebridge-esphome>`__ by `basdelfos <https://www.npmjs.com/~basdelfos>`__
 - `Custom ESPHome for Wofea V10 Alarm <https://github.com/nbergont/wofea_v10_hack>`__ by :ghuser:`nbergont`
 - `Custom Smart meter P1 port reader <https://github.com/nldroid/CustomP1UartComponent>`__ by :ghuser:`nldroid`
-- `Custom Mitsubishi HVAC HeatPump control using UART <https://github.com/geoffdavis/esphome-mitsubishiheatpump>` by :ghuser:`geoffdavis`
+- `Custom Mitsubishi HVAC HeatPump control using UART <https://github.com/geoffdavis/esphome-mitsubishiheatpump>`__ by :ghuser:`geoffdavis`
 
 Sample Configurations
 ---------------------