diff --git a/activerecord/lib/active_record/reflection.rb b/activerecord/lib/active_record/reflection.rb
index a549b28f164595dbeda08d5633865efe1ed933ba..37e18626b5afe5fa72ec5b183d41fb76b0ff9786 100644
--- a/activerecord/lib/active_record/reflection.rb
+++ b/activerecord/lib/active_record/reflection.rb
@@ -545,7 +545,7 @@ def inverse_name
           end
         end
 
-        # returns either nil or the inverse association name that it finds.
+        # returns either false or the inverse association name that it finds.
         def automatic_inverse_of
           if can_find_inverse_of_automatically?(self)
             inverse_name = ActiveSupport::Inflector.underscore(options[:as] || active_record.name.demodulize).to_sym