diff --git a/app/assets/stylesheets/application.scss b/app/assets/stylesheets/application.scss
index 39db474b7..dd8e19bbe 100644
--- a/app/assets/stylesheets/application.scss
+++ b/app/assets/stylesheets/application.scss
@@ -25,7 +25,7 @@
 // = require backoffice
 // = require carte
 // = require cgu
-// = require custom-mails
+// = require custom_mails
 // = require default_data_block
 // = require description
 // = require dossier_show
diff --git a/app/assets/stylesheets/custom-mails.scss b/app/assets/stylesheets/custom_mails.scss
similarity index 100%
rename from app/assets/stylesheets/custom-mails.scss
rename to app/assets/stylesheets/custom_mails.scss