diff --git a/frappe/__init__.py b/frappe/__init__.py
index 9721ed9b08..7872a667d4 100644
--- a/frappe/__init__.py
+++ b/frappe/__init__.py
@@ -340,7 +340,7 @@ def msgprint(msg, title=None, raise_exception=0, as_table=False, indicator=None,
 
 	message_log.append(json.dumps(out))
 
-	if raise_exception:
+	if raise_exception and raise_exception.get('__name__'):
 		local.response['exc_type'] = raise_exception.__name__
 
 	_raise_exception()