diff --git a/src/org/gestouch/gestures/MovingGestureBase.as b/src/org/gestouch/gestures/MovingGestureBase.as
index 8a52a88..ae55d1d 100644
--- a/src/org/gestouch/gestures/MovingGestureBase.as
+++ b/src/org/gestouch/gestures/MovingGestureBase.as
@@ -131,6 +131,11 @@ package org.gestouch.gestures
 		protected function _checkSlop(moveDelta:Point):Boolean
 		{
 			var slopPassed:Boolean = false;
+			if (!(slop > 0))
+			{
+				// return true immideately if slop is 0 or NaN
+				return true;
+			}
 			
 			if (_canMoveHorizontally && _canMoveVertically)
 			{