diff --git a/remotefilelog/__init__.py b/remotefilelog/__init__.py
--- a/remotefilelog/__init__.py
+++ b/remotefilelog/__init__.py
@@ -209,8 +209,17 @@
             wrapfunction(streamclone, 'maybeperformlegacystreamclone',
                          stream_wrap)
 
-            def canperformstreamclone(orig, *args, **kwargs):
-                supported, requirements = orig(*args, **kwargs)
+            def canperformstreamclone(orig, pullop, bundle2=False):
+                # remotefilelog is currently incompatible with the
+                # bundle2 flavor of streamclones, so force us to use
+                # v1 instead.
+                if 'v2' in pullop.remotebundle2caps.get('stream', []):
+                    pullop.remotebundle2caps['stream'] = [
+                        c for c in pullop.remotebundle2caps['stream']
+                        if c != 'v2']
+                if bundle2:
+                    return False, None
+                supported, requirements = orig(pullop, bundle2=bundle2)
                 if requirements is not None:
                     requirements.add(shallowrepo.requirement)
                 return supported, requirements