diff --git a/lib/scale.dart b/lib/scale.dart
index dc25087..e056250 100644
--- a/lib/scale.dart
+++ b/lib/scale.dart
@@ -226,7 +226,7 @@ class OpsScaleGestureRecognizer extends OneSequenceGestureRecognizer {
   @override
   void addAllowedPointer(PointerEvent event) {
     startTrackingPointer(event.pointer, event.transform);
-    _velocityTrackers[event.pointer] = VelocityTracker(event.kind);
+    _velocityTrackers[event.pointer] = VelocityTracker(PointerDeviceKind.touch);
     if (_state == _ScaleState.ready) {
       _state = _ScaleState.possible;
       _initialSpan = 0.0;