diff --git a/install/config.sql b/install/config.sql
index eba9c60ff..3783d0130 100644
--- a/install/config.sql
+++ b/install/config.sql
@@ -63,3 +63,4 @@ INSERT INTO piwigo_config (param,value) VALUES ('original_resize_maxwidth','2016
 INSERT INTO piwigo_config (param,value) VALUES ('original_resize_maxheight','2016');
 INSERT INTO piwigo_config (param,value) VALUES ('original_resize_quality','95');
 INSERT INTO piwigo_config (param,value) VALUES ('mobile_theme',null);
+INSERT INTO piwigo_config (param,value) VALUES ('mail_theme','clear');