diff --git a/addons/web/static/src/xml/base.xml b/addons/web/static/src/xml/base.xml
index c846e969827..161509b364f 100644
--- a/addons/web/static/src/xml/base.xml
+++ b/addons/web/static/src/xml/base.xml
@@ -22,7 +22,7 @@
 <t t-name="CrashManager.warning">
     <div class="o_dialog_warning">
         <t t-js="d">
-            var message = d.message ? d.message : d.error.data.message;
+            var message = (d.message !== undefined) ? d.message : d.error.data.message;
             d.html_error = context.engine.tools.html_escape(message).replace(/\n/g, '<br/>');
         </t>
         <t t-raw="html_error"/>