diff --git a/erpnext/patches/september_2012/event_permission.py b/erpnext/patches/september_2012/event_permission.py
new file mode 100644
index 0000000..2f1a848
--- /dev/null
+++ b/erpnext/patches/september_2012/event_permission.py
@@ -0,0 +1,15 @@
+import webnotes
+from webnotes.model.code import get_obj
+from webnotes.model.doc import addchild
+
+def execute():
+	existing = webnotes.conn.sql("""select name from `tabDocPerm`
+		where permlevel=0 and parent='Event' and role='System Manager'
+		and cancel=1""")
+	if not existing:
+		ev_obj = get_obj("DocType", "Event", with_children=1)
+		ch = addchild(ev_obj.doc, "permissions", "DocPerm")
+		ch.permlevel = 0
+		ch.role = 'System Manager'
+		ch.read = ch.write = ch.create = ch.cancel = 1
+		ch.save()
\ No newline at end of file