diff --git a/config/initializers/wicked_pdf.rb b/config/initializers/wicked_pdf.rb
index 01104b1dd..ef669e3e5 100644
--- a/config/initializers/wicked_pdf.rb
+++ b/config/initializers/wicked_pdf.rb
@@ -6,7 +6,7 @@ WickedPdf.config ||= {}
 # it is not acceptable to enable it.
 if Rails.env.production? and Rails.configuration.assets.compile == false
 
-  WickedPdfHelper::Assets.module_eval do
+  WicketPdf::WickedPdfHelper::Assets.module_eval do
 
     def read_asset(source)
        manifest = Rails.application.assets_manifest