diff --git a/SubstrateCS/Source/Nbt/TagNodeString.cs b/SubstrateCS/Source/Nbt/TagNodeString.cs
index 539bfc6..7c075b2 100644
--- a/SubstrateCS/Source/Nbt/TagNodeString.cs
+++ b/SubstrateCS/Source/Nbt/TagNodeString.cs
@@ -56,6 +56,8 @@ namespace Substrate.Nbt
         public TagNodeString (string d)
         {
             _data = d;
+            if (_data == null)
+                _data = "";
         }
 
         /// <summary>