diff --git a/lib/mongo/collection.rb b/lib/mongo/collection.rb
index 2074aee..19f4dcd 100644
--- a/lib/mongo/collection.rb
+++ b/lib/mongo/collection.rb
@@ -434,8 +434,8 @@ module Mongo
 
     # Atomically update and return a document using MongoDB's findAndModify command. (MongoDB > 1.3.0)
     #
-    # @option opts [Hash] :update (nil) the update operation to perform on the matched document.
     # @option opts [Hash] :query ({}) a query selector document for matching the desired document.
+    # @option opts [Hash] :update (nil) the update operation to perform on the matched document.
     # @option opts [Array, String, OrderedHash] :sort ({}) specify a sort option for the query using any
     #   of the sort options available for Cursor#sort. Sort order is important if the query will be matching
     #   multiple documents since only the first matching document will be updated and returned.