diff --git a/frappe/model/delete_doc.py b/frappe/model/delete_doc.py
index 5125f9d5e0..3bf49a5f6a 100644
--- a/frappe/model/delete_doc.py
+++ b/frappe/model/delete_doc.py
@@ -59,6 +59,7 @@ def delete_doc(doctype=None, name=None, force=0, ignore_doctypes=None, for_reloa
 				frappe.db.sql("delete from `tabCustom Script` where dt = %s", name)
 				frappe.db.sql("delete from `tabProperty Setter` where doc_type = %s", name)
 				frappe.db.sql("delete from `tabReport` where ref_doctype=%s", name)
+				frappe.db.sql("delete from `tabCustom DocPerm` where parent=%s", name)
 
 			delete_from_table(doctype, name, ignore_doctypes, None)
 
diff --git a/frappe/patches.txt b/frappe/patches.txt
index a546b49acd..564c73c002 100644
--- a/frappe/patches.txt
+++ b/frappe/patches.txt
@@ -187,3 +187,4 @@ frappe.patches.v8_0.update_gender_and_salutation
 execute:frappe.db.sql('update tabReport set module="Desk" where name="ToDo"')
 frappe.patches.v8_1.enable_allow_error_traceback_in_system_settings
 frappe.patches.v8_1.update_format_options_in_auto_email_report
+frappe.patches.v8_1.delete_custom_docperm_if_doctype_not_exists
\ No newline at end of file
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
new file mode 100644
index 0000000000..a46db68a16
--- /dev/null
+++ b/frappe/patches/v8_1/delete_custom_docperm_if_doctype_not_exists.py
@@ -0,0 +1,7 @@
+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` )
+	""")