diff --git a/frappe/permissions.py b/frappe/permissions.py
index 04549744d3..4d29b1e8d6 100644
--- a/frappe/permissions.py
+++ b/frappe/permissions.py
@@ -351,7 +351,7 @@ def has_user_permission(doc, user=None, debug=False):
 		# if allowed_docs is empty it states that there is no applicable permission under the current doctype
 
 		# only check if allowed_docs is not empty
-		if allowed_docs and str(docname) not in allowed_docs:
+		if allowed_docs and docname and str(docname) not in allowed_docs:
 			# no user permissions for this doc specified
 			debug and _debug_log(
 				"User doesn't have access to this document because of User Permissions, allowed documents: "