diff --git a/config/application.rb b/config/application.rb
index 420da2392a..a1bda0a7d5 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -216,7 +216,7 @@ module Openfoodnetwork
     config.assets.precompile += ['web/all.js']
     config.assets.precompile += ['darkswarm/all.js']
     config.assets.precompile += ['shared/*']
-    config.assets.precompile += %w(mail.scss)
+    config.assets.precompile += ['mail.scss']
     config.assets.precompile += ['*.jpg', '*.jpeg', '*.png', '*.gif' '*.svg']
 
     # Highlight code that triggered database queries in logs.