diff --git a/frappe/client.py b/frappe/client.py
index 01991e1b51..bd331168c2 100644
--- a/frappe/client.py
+++ b/frappe/client.py
@@ -407,10 +407,13 @@ def is_document_amended(doctype, docname):
 	return False
 
 @frappe.whitelist()
-def validate_link(doctype: str, docname):
+def validate_link(doctype: str, docname: str):
 	if not isinstance(doctype, str):
 		frappe.throw(_("DocType must be a string"))
 
+	if not isinstance(docname, str):
+		frappe.throw(_("Document Name must be a string"))
+
 	if doctype != "DocType" and not (
 		frappe.has_permission(doctype, "select")
 		or frappe.has_permission(doctype, "read")
@@ -420,5 +423,5 @@ def validate_link(doctype: str, docname):
 			.format(frappe.bold(doctype)),
 			frappe.PermissionError
 		)
-	
+
 	return frappe.db.get_value(doctype, docname, cache=True)