diff --git a/erpnext/patches/july_2012/__init__.py b/erpnext/patches/july_2012/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/erpnext/patches/july_2012/__init__.py
diff --git a/erpnext/patches/july_2012/reload_pr_po_mapper.py b/erpnext/patches/july_2012/reload_pr_po_mapper.py
new file mode 100644
index 0000000..75ee5c4
--- /dev/null
+++ b/erpnext/patches/july_2012/reload_pr_po_mapper.py
@@ -0,0 +1,4 @@
+def execute():
+	import webnotes
+	from webnotes.modules import reload_doc
+	reload_doc('buying', 'DocType Mapper', 'Purchase Request-Purchase Order')
\ No newline at end of file
diff --git a/erpnext/patches/patch_list.py b/erpnext/patches/patch_list.py
index 35b59fd..b2d5f6c 100644
--- a/erpnext/patches/patch_list.py
+++ b/erpnext/patches/patch_list.py
@@ -462,4 +462,9 @@
 		'patch_file': 'cache_item_table',
 		'description': "create cache item table again"
 	},
+	{
+		'patch_module': 'patches.july_2012',
+		'patch_file': 'reload_pr_po_mapper',
+		'description': "order date should be greater than equal to request date"
+	},
 ]
\ No newline at end of file