diff --git a/zk/base.py b/zk/base.py
index 2aad767..097af5a 100644
--- a/zk/base.py
+++ b/zk/base.py
@@ -349,7 +349,7 @@ class ZK(object):
         '''
 
         command = const.CMD_USERTEMP_RRQ
-        command_string = ''
+        command_string = chr(const.FCT_USER)
         checksum = 0
         session_id = self.__sesion_id
         reply_id = self.__reply_id
diff --git a/zk/const.py b/zk/const.py
index 4846111..ae369f8 100644
--- a/zk/const.py
+++ b/zk/const.py
@@ -95,3 +95,11 @@ EF_ALARM            = (1<<9)# Alarm signal
 
 USER_DEFAULT        = 0
 USER_ADMIN          = 14
+
+FCT_ATTLOG          = 1
+FCT_WORKCODE        = 8
+FCT_FINGERTMP       = 2
+FCT_OPLOG           = 4
+FCT_USER            = 5
+FCT_SMS             = 6
+FCT_UDATA           = 7