diff --git a/src/quic_conn.c b/src/quic_conn.c
index 7fc2ecd43..a2b42c923 100644
--- a/src/quic_conn.c
+++ b/src/quic_conn.c
@@ -4478,6 +4478,8 @@ void quic_cstream_free(struct quic_cstream *cs)
 		return;
 	}
 
+	quic_free_ncbuf(&cs->rx.ncbuf);
+
 	qc_stream_desc_release(cs->desc);
 	pool_free(pool_head_quic_cstream, cs);
 }