diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -976,7 +976,7 @@ class revlog:
 
     @util.propertycache
     def _compressor(self):
-        engine = util.compengines[self._compengine]
+        engine = util.compengines[self.feature_config.compression_engine]
         return engine.revlogcompressor(self._compengineopts)
 
     @util.propertycache
diff --git a/mercurial/revlogutils/docket.py b/mercurial/revlogutils/docket.py
--- a/mercurial/revlogutils/docket.py
+++ b/mercurial/revlogutils/docket.py
@@ -330,7 +330,9 @@ def default_docket(revlog, version_heade
     rl_version = version_header & 0xFFFF
     if rl_version not in (constants.REVLOGV2, constants.CHANGELOGV2):
         return None
-    comp = util.compengines[revlog._compengine].revlogheader()
+    comp = util.compengines[
+        revlog.feature_config.compression_engine
+    ].revlogheader()
     docket = RevlogDocket(
         revlog,
         version_header=version_header,