diff --git a/erpnext/patches/june_2012/series_unique_patch.py b/erpnext/patches/june_2012/series_unique_patch.py
new file mode 100644
index 0000000..6f85f21
--- /dev/null
+++ b/erpnext/patches/june_2012/series_unique_patch.py
@@ -0,0 +1,6 @@
+def execute():
+	"""add unique constraint to series table's name column"""
+	import webnotes
+	webnotes.conn.commit()
+	webnotes.conn.sql("alter table `tabSeries` add unique (name)")
+	webnotes.conn.begin()
\ No newline at end of file
diff --git a/erpnext/patches/patch_list.py b/erpnext/patches/patch_list.py
index 87c96c1..98c3aff 100644
--- a/erpnext/patches/patch_list.py
+++ b/erpnext/patches/patch_list.py
@@ -437,4 +437,9 @@
 		'patch_file': 'support_ticket_autoreply',
 		'description': 'New Send Autoreply checkbox in Email Settings'
 	},
+	{
+		'patch_module': 'patches.june_2012',
+		'patch_file': 'series_unique_patch',
+		'description': "add unique constraint to series table's name column"
+	},
 ]
\ No newline at end of file