diff --git a/proxy/http3/Http3Session.cc b/proxy/http3/Http3Session.cc
index ba629201e44..f993887aadc 100644
--- a/proxy/http3/Http3Session.cc
+++ b/proxy/http3/Http3Session.cc
@@ -61,7 +61,7 @@ HQSession::remove_transaction(HQTransaction *trans)
 const char *
 HQSession::get_protocol_string() const
 {
-  return this->_protocol_string;
+  return "";
 }
 
 int
@@ -201,6 +201,12 @@ Http3Session::decrement_current_active_connections_stat()
   // TODO Implement stats
 }
 
+const char *
+Http3Session::get_protocol_string() const
+{
+  return "http/3";
+}
+
 QPACK *
 Http3Session::local_qpack()
 {
diff --git a/proxy/http3/Http3Session.h b/proxy/http3/Http3Session.h
index 4d78b27a9f4..22453660461 100644
--- a/proxy/http3/Http3Session.h
+++ b/proxy/http3/Http3Session.h
@@ -77,6 +77,9 @@ class Http3Session : public HQSession
   void increment_current_active_connections_stat() override;
   void decrement_current_active_connections_stat() override;
 
+  // Implement ProxySession interface
+  const char *get_protocol_string() const override;
+
   QPACK *local_qpack();
   QPACK *remote_qpack();