diff --git a/addons/mail/static/src/core_ui/message.xml b/addons/mail/static/src/core_ui/message.xml
index 8575fa5db6f..847c50a015d 100644
--- a/addons/mail/static/src/core_ui/message.xml
+++ b/addons/mail/static/src/core_ui/message.xml
@@ -111,7 +111,7 @@
                                 </t>
 
                             </div>
-                            <div t-else="" class="position-relative">
+                            <div t-else="" class="position-relative w-100">
                                 <div class="o-mail-Message-bubble border rounded-end-3 rounded-bottom-3 position-absolute top-0 start-0 w-100 h-100" t-att-class="{
                                      'bg-info-light border-info': !message.isSelfAuthored,
                                      'bg-success-light border-success opacity-25': message.isSelfAuthored,