diff --git a/rel/i18n/emqx_schema.hocon b/rel/i18n/emqx_schema.hocon
index ffeaf83da..6cf20f90c 100644
--- a/rel/i18n/emqx_schema.hocon
+++ b/rel/i18n/emqx_schema.hocon
@@ -1369,7 +1369,7 @@ sysmon_vm_process_low_watermark.label:
 """Process low watermark"""
 
 mqtt_max_packet_size.desc:
-"""Maximum MQTT packet size allowed. Default: 1MB, Maximum: 256MB"""
+"""Maximum MQTT packet size allowed. Default: 1 MB, Maximum: 256 MB"""
 
 mqtt_max_packet_size.label:
 """Max Packet Size"""