diff --git a/backend/src/main/resources/i18n/messages_en_US.properties b/backend/src/main/resources/i18n/messages_en_US.properties
index 3ac43e7a11..5ea0284f71 100644
--- a/backend/src/main/resources/i18n/messages_en_US.properties
+++ b/backend/src/main/resources/i18n/messages_en_US.properties
@@ -184,4 +184,5 @@ automation_exec_info=There are no test steps to execute
 authsource_name_already_exists=Authentication source name already exists
 authsource_name_is_null=Authentication source name cannot be empty
 authsource_configuration_is_null=Authentication source configuration cannot be empty
+mobile_phone_number_cannot_be_empty=When the receiving mode is pin and enterprise wechat: the user's mobile phone number cannot be empty