Save default letterhead
diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index 4d69a0f..64cbc40 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -56,3 +56,4 @@
 execute:frappe.reset_perms("GL Entry") #2014-06-09
 execute:frappe.reset_perms("Stock Ledger Entry") #2014-06-09
 erpnext.patches.v4_0.create_custom_fields_for_india_specific_fields
+erpnext.patches.v4_0.save_default_letterhead
diff --git a/erpnext/patches/v4_0/save_default_letterhead.py b/erpnext/patches/v4_0/save_default_letterhead.py
new file mode 100644
index 0000000..a6db0cd
--- /dev/null
+++ b/erpnext/patches/v4_0/save_default_letterhead.py
@@ -0,0 +1,13 @@
+# Copyright (c) 2013, Web Notes Technologies Pvt. Ltd. and Contributors
+# License: GNU General Public License v3. See license.txt
+
+from __future__ import unicode_literals
+import frappe
+
+def execute():
+	"""save default letterhead to set default_letter_head_content"""
+	try:
+		letter_head = frappe.get_doc("Letter Head", {"is_default": 1})
+		letter_head.save()
+	except frappe.DoesNotExistError:
+		pass