diff --git a/Discovery-Zones.md b/Discovery-Zones.md
index 9535986..f30c67c 100644
--- a/Discovery-Zones.md
+++ b/Discovery-Zones.md
@@ -63,7 +63,7 @@ true/false value. If false, will be included on the map on official server edito
 
 ### ManualVolumeName
 
-Required if `bIsManuallyPlaced` is true. This points to a specific mesh in the map, which is part of one of the Island models. For example:
+Required if `bIsManuallyPlaced` is true. This points to either a specific mesh in the map, which is part of one of the Island models; or to a specific unlock, eg. `PowerStone7` or `SecondaryStone9`. For example:
 
 ```json
 {