diff --git a/quic/core/quic_framer.cc b/quic/core/quic_framer.cc
index 75ee18b..7517b18 100644
--- a/quic/core/quic_framer.cc
+++ b/quic/core/quic_framer.cc
@@ -1424,7 +1424,8 @@
 QuicFramer::BuildIetfVersionNegotiationPacket(
     QuicConnectionId connection_id,
     const ParsedQuicVersionVector& versions) {
-  QUIC_DVLOG(1) << "Building IETF version negotiation packet.";
+  QUIC_DVLOG(1) << "Building IETF version negotiation packet: "
+                << ParsedQuicVersionVectorToString(versions);
   DCHECK(!versions.empty());
   size_t len = kPacketHeaderTypeSize + kConnectionIdLengthSize +
                connection_id.length() +
@@ -1586,6 +1587,9 @@
     packet.versions.push_back(ParseQuicVersionLabel(version_label));
   } while (!reader->IsDoneReading());
 
+  QUIC_DLOG(INFO) << ENDPOINT << "parsed version negotiation: "
+                  << ParsedQuicVersionVectorToString(packet.versions);
+
   visitor_->OnVersionNegotiationPacket(packet);
   return true;
 }