diff --git a/trytond/trytond/url.py b/trytond/trytond/url.py
index 668536b1f3..d1f5488416 100644
--- a/trytond/trytond/url.py
+++ b/trytond/trytond/url.py
@@ -29,7 +29,7 @@ class URLAccessor(object):
             context = Transaction().context
             if context:
                 request = context.get('_request')
-        if request and request['is_secure']:
+        if request and request.get('is_secure'):
             return True
         return bool(
             config.get('ssl', 'certificate')
@@ -41,7 +41,7 @@ class URLAccessor(object):
             context = Transaction().context
             if context:
                 request = context.get('_request')
-        if request:
+        if request and 'http_host' in request:
             return request['http_host']
         return HOSTNAME
 
@@ -57,7 +57,7 @@ class URLAccessor(object):
             context = Transaction().context
             if context:
                 request = context.get('_request')
-        if request:
+        if request and 'root_path' in request:
             return request['root_path']
         return ROOT_PATH