diff -r 2b271cab2d1c -r 6d2ddea0721a mercurial/streamclone.py
--- a/mercurial/streamclone.py	Tue Jan 18 10:32:11 2022 +0100
+++ b/mercurial/streamclone.py	Mon Jan 24 11:49:06 2022 +0100
@@ -104,7 +104,7 @@
 
         streamreqs = set(streamreqs.split(b','))
         # Server requires something we don't support. Bail.
-        missingreqs = streamreqs - repo.supportedformats
+        missingreqs = streamreqs - repo.supported
         if missingreqs:
             pullop.repo.ui.warn(
                 _(
@@ -481,7 +481,7 @@
         )
 
     filecount, bytecount, requirements = readbundle1header(fp)
-    missingreqs = requirements - repo.supportedformats
+    missingreqs = requirements - repo.supported
     if missingreqs:
         raise error.Abort(
             _(b'unable to apply stream clone: unsupported format: %s')