diff --git a/renren-admin/src/main/resources/mapper/resource/ResourceDao.xml b/renren-admin/src/main/resources/mapper/resource/ResourceDao.xml
index d018e2f4..717016d2 100644
--- a/renren-admin/src/main/resources/mapper/resource/ResourceDao.xml
+++ b/renren-admin/src/main/resources/mapper/resource/ResourceDao.xml
@@ -1552,7 +1552,7 @@
         sd.sort AS "deptSort",
         sd.type AS "deptType",
         sr.sort AS "regionSort",
-        tdr.visitor
+        IFNULL( tdr.visitor, 0 ) AS visitor
         FROM
         tb_data_resource tdr
         LEFT JOIN sys_dept sd ON tdr.dept_id = sd.id