diff --git a/ICD.Common.Utils/Collections/IcdHashSet.cs b/ICD.Common.Utils/Collections/IcdHashSet.cs
index 277a3b9..346f084 100644
--- a/ICD.Common.Utils/Collections/IcdHashSet.cs
+++ b/ICD.Common.Utils/Collections/IcdHashSet.cs
@@ -246,7 +246,7 @@ namespace ICD.Common.Utils.Collections
 				throw new ArgumentNullException("items");
 
 			foreach (T item in items)
-				Add(item);
+				m_Dict[item] = null;
 		}
 
 		/// <summary>