diff --git a/library/src/com/mobeta/android/dslv/DragSortController.java b/library/src/com/mobeta/android/dslv/DragSortController.java
index a6fdd3c..06f91cd 100644
--- a/library/src/com/mobeta/android/dslv/DragSortController.java
+++ b/library/src/com/mobeta/android/dslv/DragSortController.java
@@ -382,6 +382,10 @@ public boolean onDown(MotionEvent ev) {
     @Override
     public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
 
+        if (e1 == null || e2 == null) {
+            return false;
+        }
+
         final int x1 = (int) e1.getX();
         final int y1 = (int) e1.getY();
         final int x2 = (int) e2.getX();