diff --git a/libs/core/ns.ts b/libs/core/ns.ts
index 51ccea08..c27c4aa9 100644
--- a/libs/core/ns.ts
+++ b/libs/core/ns.ts
@@ -3,7 +3,7 @@ namespace motors {
 
     /**
      * A speed picker
-     * @param speed the speed
+     * @param speed the speed, eg: 50
      */
     //% blockId=motorSpeedPicker block="%speed" shim=TD_ID
     //% speed.fieldEditor="speed" colorSecondary="#FFFFFF"