diff --git a/addons/mail/static/src/scss/attachment_box.scss b/addons/mail/static/src/scss/attachment_box.scss
index 2fbff3c2386..7008fcce61e 100644
--- a/addons/mail/static/src/scss/attachment_box.scss
+++ b/addons/mail/static/src/scss/attachment_box.scss
@@ -4,7 +4,7 @@
         min-height: 50px;
 
         .o_chatter_attachment {
-            padding: 3px;
+            padding: $o-attachment-margin;
 
             input.o_input_file {
                 position: absolute;