diff --git a/odoo/addons/base/models/ir_http.py b/odoo/addons/base/models/ir_http.py
index ba771a95753..aa4b7e862c6 100644
--- a/odoo/addons/base/models/ir_http.py
+++ b/odoo/addons/base/models/ir_http.py
@@ -269,7 +269,9 @@ class IrHttp(models.AbstractModel):
             for url, endpoint, routing in cls._generate_routing_rules(mods, converters=cls._get_converters()):
                 xtra_keys = 'defaults subdomain build_only strict_slashes redirect_to alias host'.split()
                 kw = {k: routing[k] for k in xtra_keys if k in routing}
-                routing_map.add(werkzeug.routing.Rule(url, endpoint=endpoint, methods=routing['methods'], **kw))
+                rule = werkzeug.routing.Rule(url, endpoint=endpoint, methods=routing['methods'], **kw)
+                rule.merge_slashes = False
+                routing_map.add(rule)
             cls._routing_map[key] = routing_map
         return cls._routing_map[key]
 
diff --git a/odoo/http.py b/odoo/http.py
index b4729c20917..90eeeaa165e 100644
--- a/odoo/http.py
+++ b/odoo/http.py
@@ -1268,7 +1268,9 @@ class Root(object):
         _logger.info("Generating nondb routing")
         routing_map = werkzeug.routing.Map(strict_slashes=False, converters=None)
         for url, endpoint, routing in odoo.http._generate_routing_rules([''] + odoo.conf.server_wide_modules, True):
-            routing_map.add(werkzeug.routing.Rule(url, endpoint=endpoint, methods=routing['methods']))
+            rule = werkzeug.routing.Rule(url, endpoint=endpoint, methods=routing['methods'])
+            rule.merge_slashes = False
+            routing_map.add(rule)
         return routing_map
 
     def __call__(self, environ, start_response):