diff --git a/erpnext/support/doctype/issue/issue.py b/erpnext/support/doctype/issue/issue.py
index fd72807..117267f 100644
--- a/erpnext/support/doctype/issue/issue.py
+++ b/erpnext/support/doctype/issue/issue.py
@@ -335,8 +335,13 @@
 
 	ignore_permissions = False
 	if is_website_user():
-		if not filters: filters = []
-		filters.append(("Issue", "customer", "=", customer)) if customer else filters.append(("Issue", "raised_by", "=", user))
+		if not filters: filters = {}
+
+		if customer:
+			filters["customer"] = customer
+		else:
+			filters["raised_by"] = user
+
 		ignore_permissions = True
 
 	return get_list(doctype, txt, filters, limit_start, limit_page_length, ignore_permissions=ignore_permissions)