diff --git a/superset/db_engine_specs.py b/superset/db_engine_specs.py
index 19f541d80e638..d26f633bbd266 100644
--- a/superset/db_engine_specs.py
+++ b/superset/db_engine_specs.py
@@ -502,7 +502,7 @@ def patch(cls):
     @classmethod
     def adjust_database_uri(cls, uri, selected_schema=None):
         database = uri.database
-        if selected_schema:
+        if selected_schema and database:
             if '/' in database:
                 database = database.split('/')[0] + '/' + selected_schema
             else: