diff --git a/addons/mail/static/src/core/common/message_reaction_menu.xml b/addons/mail/static/src/core/common/message_reaction_menu.xml
index d44d7d095a8..192842ad0d7 100644
--- a/addons/mail/static/src/core/common/message_reaction_menu.xml
+++ b/addons/mail/static/src/core/common/message_reaction_menu.xml
@@ -14,7 +14,7 @@
                 </div>
                 <div class="d-flex overflow-auto flex-column flex-grow-1 bg-view p-2 h-100">
                     <div t-foreach="state.reaction.personas" t-as="persona" t-key="persona.id" class="o-mail-MessageReactionMenu-persona d-flex p-1 align-items-center" t-att-class="{ 'o-isDeviceSmall': ui.isSmall }">
-                        <img class="rounded-circle o_object_fit_cover o-mail-MessageReactionMenu-avatar" t-att-src="threadService.avatarUrl(persona, props.message.originThread)"/>
+                        <img class="rounded o_object_fit_cover o-mail-MessageReactionMenu-avatar" t-att-src="threadService.avatarUrl(persona, props.message.originThread)"/>
                         <span class="d-flex flex-grow-1 align-items-center">
                             <span class="mx-2 text-truncate fs-6" t-esc="persona.name"/>
                             <div class="flex-grow-1"/>
diff --git a/addons/mail/static/src/core/web/activity_list_popover_item.xml b/addons/mail/static/src/core/web/activity_list_popover_item.xml
index 834e724d2e8..27413e93811 100644
--- a/addons/mail/static/src/core/web/activity_list_popover_item.xml
+++ b/addons/mail/static/src/core/web/activity_list_popover_item.xml
@@ -27,7 +27,7 @@
                 </t>
             </div>
             <div class="d-flex align-items-center flex-wrap mx-3">
-                <img t-if="props.activity.user_id[0]" class="me-2 rounded-circle" t-att-src="activityAssigneeAvatar" style="max-width: 1.5rem; max-height: 1.5rem;"/>
+                <img t-if="props.activity.user_id[0]" class="me-2 rounded" t-att-src="activityAssigneeAvatar" style="max-width: 1.5rem; max-height: 1.5rem;"/>
                 <div class="mt-1">
                     <t t-if="props.activity.user_id[0]">
                         <small class="text-truncate" t-esc="props.activity.user_id[1]"/>