diff --git a/odoo/addons/base/models/assetsbundle.py b/odoo/addons/base/models/assetsbundle.py
index 4cd424c994a..6fb1f24358d 100644
--- a/odoo/addons/base/models/assetsbundle.py
+++ b/odoo/addons/base/models/assetsbundle.py
@@ -111,10 +111,7 @@ class AssetsBundle(object):
                 self.javascripts.append(JavascriptAsset(self, url=f['url'], filename=f['filename'], inline=f['content']))
 
     # depreciated and will remove after v11
-    def to_html(self, sep=None, css=True, js=True, debug=False, async_load=False, url_for=(lambda url: url), **kw):
-        if 'async' in kw:
-            _logger.warning("Using deprecated argument 'async' in to_html call, use 'async_load' instead.")
-            async_load = kw['async']
+    def to_html(self, sep=None, css=True, js=True, debug=False, async_load=False, url_for=(lambda url: url)):
         nodes = self.to_node(css=css, js=js, debug=debug, async_load=async_load)
 
         if sep is None:
@@ -133,13 +130,10 @@ class AssetsBundle(object):
 
         return sep + sep.join(response)
 
-    def to_node(self, css=True, js=True, debug=False, async_load=False, **kw):
+    def to_node(self, css=True, js=True, debug=False, async_load=False):
         """
         :returns [(tagName, attributes, content)] if the tag is auto close
         """
-        if 'async' in kw:
-            _logger.warning("Using deprecated argument 'async' in to_node call, use 'async_load' instead.")
-            async_load = kw['async']
         response = []
         if debug == 'assets':
             if css and self.stylesheets:
diff --git a/odoo/addons/base/models/ir_qweb.py b/odoo/addons/base/models/ir_qweb.py
index d082db9e197..c3046dda015 100644
--- a/odoo/addons/base/models/ir_qweb.py
+++ b/odoo/addons/base/models/ir_qweb.py
@@ -179,7 +179,7 @@ class IrQWeb(models.AbstractModel, QWeb):
                             args=[ast.Str('debug')],
                             keywords=[], starargs=None, kwargs=None
                         )),
-                        ast.keyword('async', self._get_attr_bool(el.get('async', False))),
+                        ast.keyword('async_load', self._get_attr_bool(el.get('async_load', False))),
                         ast.keyword('values', ast.Name(id='values', ctx=ast.Load())),
                     ],
                     starargs=None, kwargs=None
@@ -278,11 +278,9 @@ class IrQWeb(models.AbstractModel, QWeb):
     # compatibility to remove after v11 - DEPRECATED
     @tools.conditional(
         'xml' not in tools.config['dev_mode'],
-        tools.ormcache_context('xmlid', 'options.get("lang", "en_US")', 'css', 'js', 'debug', 'kw.get("async")', 'async_load', keys=("website_id",)),
+        tools.ormcache_context('xmlid', 'options.get("lang", "en_US")', 'css', 'js', 'debug', 'async_load', keys=("website_id",)),
     )
-    def _get_asset(self, xmlid, options, css=True, js=True, debug=False, async_load=False, values=None, **kw):
-        if 'async' in kw:
-            async_load = kw['async']
+    def _get_asset(self, xmlid, options, css=True, js=True, debug=False, async_load=False, values=None):
         files, remains = self._get_asset_content(xmlid, options)
         asset = self.get_asset_bundle(xmlid, files, remains, env=self.env)
         return asset.to_html(css=css, js=js, debug=debug, async_load=async_load, url_for=(values or {}).get('url_for', lambda url: url))
@@ -291,11 +289,9 @@ class IrQWeb(models.AbstractModel, QWeb):
         # in non-xml-debug mode we want assets to be cached forever, and the admin can force a cache clear
         # by restarting the server after updating the source code (or using the "Clear server cache" in debug tools)
         'xml' not in tools.config['dev_mode'],
-        tools.ormcache_context('xmlid', 'options.get("lang", "en_US")', 'css', 'js', 'debug', 'kw.get("async")', 'async_load', keys=("website_id",)),
+        tools.ormcache_context('xmlid', 'options.get("lang", "en_US")', 'css', 'js', 'debug', 'async_load', keys=("website_id",)),
     )
-    def _get_asset_nodes(self, xmlid, options, css=True, js=True, debug=False, async_load=False, values=None, **kw):
-        if 'async' in kw:
-            async_load = kw['async']
+    def _get_asset_nodes(self, xmlid, options, css=True, js=True, debug=False, async_load=False, values=None):
         files, remains = self._get_asset_content(xmlid, options)
         asset = self.get_asset_bundle(xmlid, files, env=self.env)
         remains = [node for node in remains if (css and node[0] == 'link') or (js and node[0] != 'link')]