diff --git a/addons/mass_mailing/static/src/less/themes/theme_default.less b/addons/mass_mailing/static/src/less/themes/theme_default.less
index 2636d793bd8..24afa9ba067 100644
--- a/addons/mass_mailing/static/src/less/themes/theme_default.less
+++ b/addons/mass_mailing/static/src/less/themes/theme_default.less
@@ -133,6 +133,9 @@
     }
     .o_mail_header_social {
         margin-right: 20px;
+        a {
+            display: inline-block;
+        }
     }
 }