diff --git a/src/Protocol/LanguageProtocolRpcOptionsBase.cs b/src/Protocol/LanguageProtocolRpcOptionsBase.cs
index b9afc3648..622194d54 100644
--- a/src/Protocol/LanguageProtocolRpcOptionsBase.cs
+++ b/src/Protocol/LanguageProtocolRpcOptionsBase.cs
@@ -13,7 +13,7 @@ public T AddTextDocumentIdentifier(params ITextDocumentIdentifier[] handlers)
         {
             foreach (var item in handlers)
             {
-                Services.AddSingleton(typeof(ITextDocumentIdentifier), handlers);
+                Services.AddSingleton(typeof(ITextDocumentIdentifier), item);
             }
 
             return (T) (object) this;