diff --git a/frappe/patches/v8_1/delete_custom_docperm_if_doctype_not_exists.py b/frappe/patches/v8_1/delete_custom_docperm_if_doctype_not_exists.py
index 18576a3029..ce6bc31364 100644
--- a/frappe/patches/v8_1/delete_custom_docperm_if_doctype_not_exists.py
+++ b/frappe/patches/v8_1/delete_custom_docperm_if_doctype_not_exists.py
@@ -3,5 +3,5 @@ import frappe
 def execute():
 	frappe.db.sql("""delete from `tabCustom DocPerm`
 		where parent not in ( select name from `tabDocType` )
-			and parent not in ( select name from `tabCustom Doctype` )
+			and parent not in ( select name from `tabCustom DocType` )
 	""")