diff --git a/cave_data/1623-2004-09.html b/cave_data/1623-2004-09.html
index 87bd77e63..6b69201e6 100644
--- a/cave_data/1623-2004-09.html
+++ b/cave_data/1623-2004-09.html
@@ -17,6 +17,7 @@ the form documented at
 
 <cave>
 <non_public>False</non_public>
+<unexplored>True</unexplored>
 
 <official_name></official_name>
 <area>1623</area>