diff --git a/TeleSharp.TL/TLContext.cs b/TeleSharp.TL/TLContext.cs
index be43936..6cd090f 100644
--- a/TeleSharp.TL/TLContext.cs
+++ b/TeleSharp.TL/TLContext.cs
@@ -20,7 +20,10 @@ namespace TeleSharp.TL
                      where t.IsSubclassOf(typeof(TLObject))
                      where t.GetCustomAttribute(typeof(TLObjectAttribute)) != null
                      select t).ToDictionary(x => ((TLObjectAttribute)x.GetCustomAttribute(typeof(TLObjectAttribute))).Constructor, x => x);
-            Types.Add(481674261, typeof(TLVector<>));
+            if (!Types.TryGetValue(481674261, out _))
+            {
+                Types.Add(481674261, typeof(TLVector<>));
+            }
         }
 
         public static Type getType(int Constructor)