diff --git a/addons/mail/static/src/components/thread_view/thread_view.xml b/addons/mail/static/src/components/thread_view/thread_view.xml
index f637074f0b6..70de1057f0f 100644
--- a/addons/mail/static/src/components/thread_view/thread_view.xml
+++ b/addons/mail/static/src/components/thread_view/thread_view.xml
@@ -23,6 +23,9 @@
                         t-ref="messageList"
                     />
                 </t>
+                <t t-elif="props.hasComposer">
+                    <div class="o-autogrow"/>
+                </t>
                 <t t-if="props.hasComposer">
                     <Composer
                         class="o_ThreadView_composer"