diff --git a/src/Libraries/CoreNodes/List.cs b/src/Libraries/CoreNodes/List.cs
index 0288c0b7e03..0ca35948502 100644
--- a/src/Libraries/CoreNodes/List.cs
+++ b/src/Libraries/CoreNodes/List.cs
@@ -625,6 +625,15 @@ public static IList ShiftIndices(IList list, int amount)
         [IsVisibleInDynamoLibrary(true)]
         public static object GetItemAtIndex(IList list, int index)
         {
+            if (index<0)
+            {
+                index = list.Count + index;
+            }
+
+            if (index >= list.Count || index < 0)
+            {
+                throw new IndexOutOfRangeException();
+            }
             return list[index];
         }