diff --git a/src/Libraries/CoreNodes/Data.cs b/src/Libraries/CoreNodes/Data.cs
index 959586acacc..2474dd20f5b 100644
--- a/src/Libraries/CoreNodes/Data.cs
+++ b/src/Libraries/CoreNodes/Data.cs
@@ -961,9 +961,9 @@ internal static bool IsSupportedDataNodeDynamoType([ArbitraryDimensionArrayImpor
             }
             else
             {
-                if (inputValue is not ArrayList arrayList) return false;
+                if (inputValue is not IEnumerable list || inputValue is string) return false;
 
-                foreach (var item in arrayList) 
+                foreach (var item in list) 
                 {
                     if (!IsItemOfType(item, type))
                     {