diff --git a/lib/mutant/matcher.rb b/lib/mutant/matcher.rb
index d3bbe842..394052bb 100644
--- a/lib/mutant/matcher.rb
+++ b/lib/mutant/matcher.rb
@@ -14,6 +14,7 @@ module Mutant
     #   if block given
     #
     # @return [Enumerable<Subject>]
+    #   otherwise
     #
     # @api private
     #