diff --git a/libp2p/stream_muxer/mplex/mplex.py b/libp2p/stream_muxer/mplex/mplex.py
index 4ef0300..307e78d 100644
--- a/libp2p/stream_muxer/mplex/mplex.py
+++ b/libp2p/stream_muxer/mplex/mplex.py
@@ -69,7 +69,7 @@ class Mplex(IMuxedConn):
 
     @property
     def is_initiator(self) -> bool:
-        return self.secured_conn.initiator
+        return self.secured_conn.is_initiator
 
     async def close(self) -> None:
         """
diff --git a/libp2p/stream_muxer/muxer_multistream.py b/libp2p/stream_muxer/muxer_multistream.py
index 7f6ee07..00e1428 100644
--- a/libp2p/stream_muxer/muxer_multistream.py
+++ b/libp2p/stream_muxer/muxer_multistream.py
@@ -56,7 +56,7 @@ class MuxerMultistream:
         """
         protocol: TProtocol
         communicator = MultiselectCommunicator(conn)
-        if conn.initiator:
+        if conn.is_initiator:
             protocol = await self.multiselect_client.select_one_of(
                 tuple(self.transports.keys()), communicator
             )