diff --git a/libraries/AP_Arming/AP_Arming.cpp b/libraries/AP_Arming/AP_Arming.cpp
index 449e5a2be2..bbc928c880 100644
--- a/libraries/AP_Arming/AP_Arming.cpp
+++ b/libraries/AP_Arming/AP_Arming.cpp
@@ -107,7 +107,6 @@ const AP_Param::GroupInfo AP_Arming::var_info[] = {
     // @User: Advanced
     AP_GROUPINFO("MIS_ITEMS",    7,     AP_Arming, _required_mission_items, 0),
 
-    // index 4 was VOLT_MIN, moved to AP_BattMonitor
     AP_GROUPEND
 };