diff --git a/README.markdown b/README.markdown
index 983575b..2515cc2 100644
--- a/README.markdown
+++ b/README.markdown
@@ -247,6 +247,7 @@ set of drivers supporting a number of devices:
   - MakeyButton
   - Maxbotix Ultrasonic Range Finder
   - Motor
+  - Relay
   - RGB LED
   - Servo