diff --git a/core/views/caves.py b/core/views/caves.py
index 5b34551..cb4496e 100644
--- a/core/views/caves.py
+++ b/core/views/caves.py
@@ -477,10 +477,16 @@ def edit_entrance(request, path="", caveslug=None, entslug=None):
                 entrance.slug = slugname
                 entrance.cached_primary_slug = slugname
                 entrance.filename = slugname + ".html"
+            else:
+                entrance.slug = entslug
+                entrance.cached_primary_slug = entslug
+                entrance.filename = entslug + ".html"
             entrance.save()
             entrance_letter.entrance = entrance
             entrance_letter.save()
             
+            if not entrance.filename:
+                print(f"! BARF - why no filename set?  '{entslug}' letter:{entletter.cleaned_data['entrance_letter']}")
             entrance_file = entrance.file_output()
             print(f"Online edit of entrance {entrance.slug}")
             cave_file = cave.file_output()