diff --git a/trytond/trytond/backend/postgresql/database.py b/trytond/trytond/backend/postgresql/database.py
index 4e1c61aaf9..bcbf462b1c 100644
--- a/trytond/trytond/backend/postgresql/database.py
+++ b/trytond/trytond/backend/postgresql/database.py
@@ -249,7 +249,7 @@ class Database(DatabaseInterface):
         if uri.path and uri.path != '/':
             warnings.warn("The path specified in the URI will be overridden")
         params = {
-            'dsn': uri._replace(path=name).geturl(),
+            'dsn': uri._replace(path='/' + name).geturl(),
             }
         return params