1 files changed, 2 insertions, 4 deletions
diff --git a/lib/plist/parser.rb b/lib/plist/parser.rb
index 705d823..4835f8b 100755
--- a/lib/plist/parser.rb
+++ b/lib/plist/parser.rb
@@ -130,10 +130,8 @@ module Plist
   end
 
   class PTag
-    @@mappings = {}
-
     def self.mappings
-      @@mappings
+      @mappings ||= {}
     end
 
     def self.inherited(sub_class)
@@ -141,7 +139,7 @@ module Plist
       key.gsub!(/^plist::/, '')
       key.gsub!(/^p/, '')  unless key == "plist"
 
-      @@mappings[key] = sub_class
+      mappings[key] = sub_class
     end
 
     attr_accessor :text, :children