diff --git a/tools/gen_addon_readme.py b/tools/gen_addon_readme.py
index ef5c7ac5..8db976d3 100644
--- a/tools/gen_addon_readme.py
+++ b/tools/gen_addon_readme.py
@@ -111,6 +111,9 @@ def __init__(self, level: int):
     # Use the short form of syntax highlighting so that the generated
     # Pygments CSS can be used to style the output.
     "syntax_highlight": "short",
+    # Since odoo/odoo@8d06889, Odoo emits a warning
+    # if index.html contains an xml declaration
+    "xml_declaration": False,
 }
 
 # GitHub Flavored Markdown