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-rw-r--r--mitmproxy/dump.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/mitmproxy/dump.py b/mitmproxy/dump.py
index d7f076cf..7b4609b4 100644
--- a/mitmproxy/dump.py
+++ b/mitmproxy/dump.py
@@ -73,7 +73,7 @@ class DumpMaster(flow.FlowMaster):
self.set_stream_large_bodies(options.stream_large_bodies)
- if self.server.config.http2 and not tcp.HAS_ALPN: # pragma: no cover
+ if self.server and self.server.config.http2 and not tcp.HAS_ALPN: # pragma: no cover
print("ALPN support missing (OpenSSL 1.0.2+ required)!\n"
"HTTP/2 is disabled. Use --no-http2 to silence this warning.",
file=sys.stderr)