diff --git a/erpnext/utilities/doctype/trash_control/trash_control.py b/erpnext/utilities/doctype/trash_control/trash_control.py
index 644a278..228160e 100644
--- a/erpnext/utilities/doctype/trash_control/trash_control.py
+++ b/erpnext/utilities/doctype/trash_control/trash_control.py
@@ -26,7 +26,7 @@
   # -----------
   def get_masters(self):
     mlist = []
-    res = sql("select distinct t1.name from tabDocType t1, tabDocPerm t2 where ifnull(t1.allow_trash, 0) = 1 and (ifnull(t2.write, 0) = 1 or ifnull(t2.create, 0) = 1) and t2.role in %s and t2.parent = t1.name and t1.module not in ('DocType','Application Internal','Recycle Bin','Development','Testing','Testing System','Test') ORDER BY t1.name" % cstr(tuple(webnotes.user.get_roles())))
+    res = sql("select distinct t1.name from tabDocType t1, tabDocPerm t2 where ifnull(t1.allow_trash, 0) = 1 and (ifnull(t2.write, 0) = 1 or ifnull(t2.create, 0) = 1) and t2.role in (%s) and t2.parent = t1.name and t1.module not in ('DocType','Application Internal','Recycle Bin','Development','Testing','Testing System','Test') ORDER BY t1.name" % ("'"+"', '".join(webnotes.user.get_roles())+"'"))
     for r in res:
       mlist.append(r[0])
     return mlist
@@ -56,4 +56,4 @@
       for r in arg[k]:
         sql("update `tab%s` set docstatus = 0, modified = '%s', trash_reason = '' where name = '%s'" % (k, now(), r))
         dt_obj = get_obj(k,r)
-        if hasattr(dt_obj, 'on_restore'): dt_obj.on_restore()
\ No newline at end of file
+        if hasattr(dt_obj, 'on_restore'): dt_obj.on_restore()