diff --git a/addons/web/static/src/xml/base_common.xml b/addons/web/static/src/xml/base_common.xml
index 1570b5a8717..2af69b61118 100644
--- a/addons/web/static/src/xml/base_common.xml
+++ b/addons/web/static/src/xml/base_common.xml
@@ -3,7 +3,7 @@
 
 <!-- These templates are accessible in backend and frontend -->
 
-<div t-name="Dialog" class="modal" tabindex="-1" data-backdrop="static" role="dialog" aria-hidden="true">
+<div t-name="Dialog" class="modal" tabindex="-1" data-backdrop="static" role="dialog" aria-hidden="true" t-att-id="_.uniqueId('modal_')">
     <div class="modal-dialog">
         <div class="modal-content">
             <div class="modal-header">