diff --git a/docs/projects/rock-paper-scissors.md b/docs/projects/rock-paper-scissors.md
index ebf4ed8b..74e6353f 100644
--- a/docs/projects/rock-paper-scissors.md
+++ b/docs/projects/rock-paper-scissors.md
@@ -8,7 +8,7 @@ Use the accelerometer and the screen to build a **Rock Paper Scissors** game tha
 
 ## Step 1 @fullscreen
 
-Add a ``||input:on shake||`` block to run code when when you shake the @boardname@.
+Add a ``||input:on shake||`` block to run code when you shake the @boardname@.
 
 ```blocks
 input.onGesture(Gesture.Shake, () => {