diff --git a/erpnext/patches/mar_2012/earning_deduction_type_patch.py b/erpnext/patches/mar_2012/earning_deduction_type_patch.py
new file mode 100644
index 0000000..438b34e
--- /dev/null
+++ b/erpnext/patches/mar_2012/earning_deduction_type_patch.py
@@ -0,0 +1,14 @@
+def execute():
+	import webnotes
+	webnotes.conn.sql("""
+		UPDATE `tabDocField`
+		SET fieldtype = 'Link', options = 'Deduction Type'
+		WHERE parent = 'Deduction Detail'
+		AND fieldname = 'd_type'
+		""")
+	webnotes.conn.sql("""
+		UPDATE `tabDocField`
+		SET fieldtype = 'Link', options = 'Earning Type'
+		WHERE parent = 'Earning Detail'
+		AND fieldname = 'e_type'
+		""")