diff --git a/app/models/blacklight/icon.rb b/app/models/blacklight/icon.rb
index 84d90197d2..6b689c365f 100644
--- a/app/models/blacklight/icon.rb
+++ b/app/models/blacklight/icon.rb
@@ -41,7 +41,7 @@ def file_source
     private
 
     def file
-      Rails.application.assets.find_asset(path)
+      (Rails.application.assets || ::Sprockets::Railtie.build_environment(Rails.application)).find_asset(path)
     end
 
     def classes