diff --git a/docs/sparse_retriever.md b/docs/sparse_retriever.md
index 89b48fd..c4bb7fd 100755
--- a/docs/sparse_retriever.md
+++ b/docs/sparse_retriever.md
@@ -67,7 +67,7 @@ sr = sr.index_file(
   callback=lambda doc: {      # Callback defaults to None.
     "id": doc["id"],
     "text": doc["title"] + ". " + doc["text"],          
-  )
+  })
 ```
 
 ### Load