diff --git a/lib/pdf/core/filters.rb b/lib/pdf/core/filters.rb
index 6ac02c8..42f7050 100644
--- a/lib/pdf/core/filters.rb
+++ b/lib/pdf/core/filters.rb
@@ -31,6 +31,16 @@ def self.decode(stream, _params = nil)
           stream
         end
       end
+      
+      module JPXDecode
+        def self.encode(stream, params = nil)
+          stream
+        end
+
+        def self.decode(stream, params = nil)
+          stream
+        end
+      end
     end
   end
 end