diff --git a/datastore/query.nim b/datastore/query.nim
index 5ff50de..0e7d925 100644
--- a/datastore/query.nim
+++ b/datastore/query.nim
@@ -90,6 +90,7 @@ type
     data*: ValueBuffer
 
 proc threadSafeType*(tp: typedesc[QueryResponseBuffer]) =
+  ## QueryResponseBuffer is a thread-safe type
   discard
 
 proc toBuffer*(q: Query): QueryBuffer =