diff --git a/cave_data/1623-87.html b/cave_data/1623-87.html
index a5ae7bf57..53a8f209a 100644
--- a/cave_data/1623-87.html
+++ b/cave_data/1623-87.html
@@ -18,12 +18,12 @@
 
 <entrance>
   <entranceslug>1623-87a</entranceslug>
-  <letter></letter>
+  <letter>a</letter>
 </entrance>
 
 <entrance>
   <entranceslug>1623-87b</entranceslug>
-  <letter></letter>
+  <letter>b</letter>
 </entrance>
 
 <explorers>CUCC 1980, 1987</explorers>