diff --git a/addons/web/static/src/xml/base.xml b/addons/web/static/src/xml/base.xml
index 56f7c379c65..396bd8e8642 100644
--- a/addons/web/static/src/xml/base.xml
+++ b/addons/web/static/src/xml/base.xml
@@ -786,7 +786,7 @@
 <t t-name="FormRenderingSheet" t-extend="FormRenderingForm">
 </t>
 <t t-name="FormRenderingGroup">
-    <t t-call="FormRenderingSeparator"/>
+    <t t-if="string" t-call="FormRenderingSeparator"/>
     <table border="0" cellpadding="0" cellspacing="0" width="100%" t-attf-class="oe_form_group classnames"/>
 </t>
 <t t-name="FormRenderingNotebook">