diff --git a/frappe/modules/patch_handler.py b/frappe/modules/patch_handler.py
index a499133163..3bade9c3f5 100644
--- a/frappe/modules/patch_handler.py
+++ b/frappe/modules/patch_handler.py
@@ -14,6 +14,9 @@ from __future__ import unicode_literals
 """
 import frappe, frappe.permissions
 
+# for patches
+import os
+
 class PatchError(Exception): pass
 
 def run_all():