diff --git a/database/mysql/mysql_user.py b/database/mysql/mysql_user.py
index 79dee70a3f0..06509fdf18b 100644
--- a/database/mysql/mysql_user.py
+++ b/database/mysql/mysql_user.py
@@ -341,7 +341,7 @@ def privileges_unpack(priv):
 
     # if we are only specifying something like REQUIRESSL and/or GRANT (=WITH GRANT OPTION) in *.*
     # we still need to add USAGE as a privilege to avoid syntax errors
-    if 'REQUIRESSL' in priv and not set(output['*.*']).difference(set('GRANT', 'REQUIRESSL')):
+    if 'REQUIRESSL' in priv and not set(output['*.*']).difference(set(['GRANT', 'REQUIRESSL'])):
         output['*.*'].append('USAGE')
 
     return output