diff --git a/mercurial/configitems.py b/mercurial/configitems.py
--- a/mercurial/configitems.py
+++ b/mercurial/configitems.py
@@ -134,6 +134,9 @@ coreconfigitem('server', 'maxhttpheaderl
 coreconfigitem('server', 'preferuncompressed',
     default=False,
 )
+coreconfigitem('server', 'uncompressedallowsecret',
+    default=False,
+)
 coreconfigitem('ui', 'clonebundleprefers',
     default=list,
 )
diff --git a/mercurial/streamclone.py b/mercurial/streamclone.py
--- a/mercurial/streamclone.py
+++ b/mercurial/streamclone.py
@@ -172,7 +172,7 @@ def allowservergeneration(repo):
     # So don't allow this by default.
     secret = phases.hassecret(repo)
     if secret:
-        return repo.ui.configbool('server', 'uncompressedallowsecret', False)
+        return repo.ui.configbool('server', 'uncompressedallowsecret')
 
     return True