diff --git a/angular-drag-and-drop-lists.js b/angular-drag-and-drop-lists.js
index 8a07ce3..0cb870e 100644
--- a/angular-drag-and-drop-lists.js
+++ b/angular-drag-and-drop-lists.js
@@ -336,8 +336,11 @@
             } else {
               var isFirstHalf = event.clientY < rect.top + rect.height / 2;
             }
-            listNode.insertBefore(placeholderNode,
-                isFirstHalf ? listItemNode : listItemNode.nextSibling);
+            if(isFirstHalf) {
+              if(listItemNode.previousSibling != placeholderNode) listNode.insertBefore(placeholderNode, listItemNode);
+            } else {
+              if(listItemNode.nextSibling != placeholderNode) listNode.insertBefore(placeholderNode, listItemNode.nextSibling);
+            }
           }
         }