diff --git a/addons/web/static/src/xml/base.xml b/addons/web/static/src/xml/base.xml
index fb7ccdf7d8e..b0faafc4f72 100644
--- a/addons/web/static/src/xml/base.xml
+++ b/addons/web/static/src/xml/base.xml
@@ -530,16 +530,17 @@
t-att-id="'treerow_' + record.id"
t-att-data-id="record.id" t-att-data-level="level + 1">