1 files changed, 5 insertions, 5 deletions
diff --git a/ext/psych/lib/psych/class_loader.rb b/ext/psych/lib/psych/class_loader.rb
index a5d1a7a4a9..50efc35ee2 100644
--- a/ext/psych/lib/psych/class_loader.rb
+++ b/ext/psych/lib/psych/class_loader.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
-require 'psych/omap'
-require 'psych/set'
+require_relative 'omap'
+require_relative 'set'
 
 module Psych
   class ClassLoader # :nodoc:
@@ -35,7 +35,7 @@ module Psych
 
     constants.each do |const|
       konst = const_get const
-      class_eval <<~RUBY
+      class_eval <<~RUBY, __FILE__, __LINE__ + 1
         def #{const.to_s.downcase}
           load #{konst.inspect}
         end
@@ -86,7 +86,7 @@ module Psych
         if @symbols.include? sym
           super
         else
-          raise DisallowedClass, 'Symbol'
+          raise DisallowedClass.new('load', 'Symbol')
         end
       end
 
@@ -96,7 +96,7 @@ module Psych
         if @classes.include? klassname
           super
         else
-          raise DisallowedClass, klassname
+          raise DisallowedClass.new('load', klassname)
         end
       end
     end