diff --git a/lib/mongo/collection.rb b/lib/mongo/collection.rb
index 263d773..0d06cde 100644
--- a/lib/mongo/collection.rb
+++ b/lib/mongo/collection.rb
@@ -157,7 +157,7 @@ module Mongo
     #   the normal cursor timeout behavior of the mongod process. When +false+, the returned cursor will never timeout. Note
     #   that disabling timeout will only work when #find is invoked with a block. This is to prevent any inadvertant failure to
     #   close the cursor, as the cursor is explicitly closed when block code finishes.
-    # @options opts [Block] :transformer (nil) a block for tranforming returned documents.
+    # @option opts [Block] :transformer (nil) a block for tranforming returned documents.
     #   This is normally used by object mappers to convert each returned document to an instance of a class.
     #
     # @raise [ArgumentError]