diff --git a/quic/core/chlo_extractor.cc b/quic/core/chlo_extractor.cc
index 4b38ad2..0e8e6f5 100644
--- a/quic/core/chlo_extractor.cc
+++ b/quic/core/chlo_extractor.cc
@@ -315,6 +315,8 @@
                             const QuicTagVector& create_session_tag_indicators,
                             Delegate* delegate,
                             uint8_t connection_id_length) {
+  QUIC_DVLOG(1) << "Extracting CHLO using versions "
+                << ParsedQuicVersionVectorToString(versions);
   QuicFramer framer(versions, QuicTime::Zero(), Perspective::IS_SERVER,
                     connection_id_length);
   ChloFramerVisitor visitor(&framer, create_session_tag_indicators, delegate);