diff --git a/script/spot.js b/script/spot.js
index c39b6dd..6e3fc6b 100755
--- a/script/spot.js
+++ b/script/spot.js
@@ -391,6 +391,8 @@ $.prototype.onSwipe = function(fOnMove, fOnEnd){
 			var oPos = getDragPosition(e);
 			$This.data('x-start', oPos.x);
 			$This.data('y-start', oPos.y);
+			$This.data('x-move', oPos.x);
+			$This.data('y-move', oPos.y);
 			$This.data('moving', true).addClass('moving');
 		})
 		.on('touchmove mousemove', (e) => {