diff --git a/modoboa/core/management/commands/generate_postfix_maps.py b/modoboa/core/management/commands/generate_postfix_maps.py
index dd4036481..474a2f6a8 100644
--- a/modoboa/core/management/commands/generate_postfix_maps.py
+++ b/modoboa/core/management/commands/generate_postfix_maps.py
@@ -99,7 +99,7 @@ query = {{ query|safe }}
             if dburl else settings.DATABASES["default"])
         if "sqlite" in db_settings["ENGINE"]:
             dbtype = "sqlite"
-        elif "psycopg2" in db_settings["ENGINE"]:
+        elif "postgresql" in db_settings["ENGINE"]:
             dbtype = "postgres"
         else:
             dbtype = "mysql"