diff --git a/plugins/mysql/index.py b/plugins/mysql/index.py
index af4622712..0bdba5166 100755
--- a/plugins/mysql/index.py
+++ b/plugins/mysql/index.py
@@ -2664,6 +2664,10 @@ def doFullSyncUser(version=''):
         return data[1]
 
     sync_db = args['db']
+
+    if sync_db.lower() == 'all':
+        sync_db = '--all-databases'
+
     sync_sign = args['sign']
 
     db = pMysqlDb()