diff --git a/extensions/odoo_theme/static/style.scss b/extensions/odoo_theme/static/style.scss
index e3492b5bf..44b096b21 100644
--- a/extensions/odoo_theme/static/style.scss
+++ b/extensions/odoo_theme/static/style.scss
@@ -856,6 +856,7 @@ header.o_main_header {
             display: inline-block;
             border-radius: 0;
             border-width: 0 0 0 3px;
+            width: 100%;
             @include font-size($font-size-secondary);
 
             code {