diff --git a/docs/reference/docs/index_.asciidoc b/docs/reference/docs/index_.asciidoc
index 88331746315..bedeca092c7 100644
--- a/docs/reference/docs/index_.asciidoc
+++ b/docs/reference/docs/index_.asciidoc
@@ -344,6 +344,10 @@ parameter can be used.
 
 Valid write consistency values are `one`, `quorum`, and `all`.
 
+Note, for the case where the number of replicas is 1 (total of 2 copies
+of the data), then the default behavior is to succeed if 1 copy (the primary)
+can perform the write.
+
 [float]
 [[index-replication]]
 === Asynchronous Replication