diff --git a/python/plugins/db_manager/db_plugins/postgis/connector.py b/python/plugins/db_manager/db_plugins/postgis/connector.py
index 855960cae4e..14c5fdcc7bd 100644
--- a/python/plugins/db_manager/db_plugins/postgis/connector.py
+++ b/python/plugins/db_manager/db_plugins/postgis/connector.py
@@ -74,7 +74,7 @@ class PostGisDBConnector(DBConnector):
             for i in range(3):
                 (ok, username, password) = QgsCredentials.instance().get(conninfo, username, password, err)
                 if not ok:
-                    raise ConnectionError(QCoreApplication.translate('db_manager', 'Could not connect to database as user {}').format(user=username))
+                    raise ConnectionError(QCoreApplication.translate('db_manager', 'Could not connect to database as user {user}').format(user=username))
 
                 if username:
                     uri.setUsername(username)