diff --git a/patches/march_2013/__init__.py b/patches/march_2013/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/patches/march_2013/update_po_prevdoc_doctype.py b/patches/march_2013/update_po_prevdoc_doctype.py
new file mode 100644
index 0000000000..35e7a257b4
--- /dev/null
+++ b/patches/march_2013/update_po_prevdoc_doctype.py
@@ -0,0 +1,6 @@
+import webnotes
+def execute():
+	webnotes.conn.sql("""update `tabPurchase Order Item` set prevdoc_doctype = 'Material Request' 
+		where prevdoc_doctype = 'Purchase Request'""")
+	webnotes.conn.sql("""update `tabSupplier Quotation Item` 
+		set prevdoc_doctype = 'Material Request' where prevdoc_doctype = 'Purchase Request'""")
\ No newline at end of file