diff --git a/CHANGELOG.md b/CHANGELOG.md
index c1d5a135e..8d2edd9cf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Web UI
 
 - Fix TypeError in Peers Tab setting country flag.
+- Fix reverse proxy header TypeError (#3260).
 
 ### Documentation
 
diff --git a/deluge/ui/web/server.py b/deluge/ui/web/server.py
index 3dceaf6ba..c2a0df12d 100644
--- a/deluge/ui/web/server.py
+++ b/deluge/ui/web/server.py
@@ -571,7 +571,7 @@ class TopLevel(resource.Resource):
     def getChildWithDefault(self, path, request):  # NOQA: N802
         # Calculate the request base
         header = request.getHeader(b'x-deluge-base')
-        base = header if header else component.get('DelugeWeb').base
+        base = header.decode('utf-8') if header else component.get('DelugeWeb').base
 
         # validate the base parameter
         if not base: