diff --git a/boostmovehub.ts b/boostmovehub.ts
index d967622..8b8525f 100644
--- a/boostmovehub.ts
+++ b/boostmovehub.ts
@@ -114,6 +114,9 @@ export class BoostMoveHub extends LPF2Hub {
      */
     public setMotorAngle (port: string, angle: number, speed: number = 100) {
         const portObj = this._ports[port];
+        if (!(portObj.type === Consts.Devices.BOOST_INTERACTIVE_MOTOR || portObj.type === Consts.Devices.BOOST_MOVE_HUB_MOTOR)) {
+            throw new Error("Angle rotation is only available when using a Boost Interactive Motor or Boost Move Hub Motor");
+        }
         return new Promise((resolve, reject) => {
             portObj.busy = true;
             const data = Buffer.from([0x0e, 0x00, 0x81, portObj.value, 0x11, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x64, 0x7f, 0x03]);
diff --git a/puphub.ts b/puphub.ts
index a16afac..5c43dca 100644
--- a/puphub.ts
+++ b/puphub.ts
@@ -36,8 +36,7 @@ export class PUPHub extends LPF2Hub {
         this.type = Consts.Hubs.POWERED_UP_HUB;
         this._ports = {
             "A": new Port("A", 0),
-            "B": new Port("B", 1),
-            "AB": new Port("AB", 57)
+            "B": new Port("B", 1)
         };
         debug("Discovered Powered Up Hub");
     }