diff --git a/potentiometer/constants.ts b/potentiometer/constants.ts
index a002b1ca9..aede08b24 100644
--- a/potentiometer/constants.ts
+++ b/potentiometer/constants.ts
@@ -7,6 +7,8 @@ namespace jacdac {
         Slider = 0x1,
         //% block="rotary"
         Rotary = 0x2,
+        //% block="hall"
+        Hall = 0x3,
     }
 
     export const enum PotentiometerReg {