diff --git a/docs/client-concepts/serialization/modeling-documents-with-types.asciidoc b/docs/client-concepts/serialization/modeling-documents-with-types.asciidoc
index d4e57b6d575..cfbaa464924 100644
--- a/docs/client-concepts/serialization/modeling-documents-with-types.asciidoc
+++ b/docs/client-concepts/serialization/modeling-documents-with-types.asciidoc
@@ -19,7 +19,7 @@ We can model documents using a regular class (POCO).
 include-tagged::{doc-tests-src}/ClientConcepts/Serialization/ModellingDocumentsWithTypesTests.cs[my-document-poco]
 ----
 
-We can then index the an instance of the document into {es}.
+We can then index an instance of the document into {es}.
 
 [source,csharp]
 ----
@@ -34,4 +34,4 @@ The index request is serialized, with the source serializer handling the `MyDocu
 {
   "stringProperty": "value"
 }
-----
\ No newline at end of file
+----