1 files changed, 3 insertions, 0 deletions
diff --git a/src/lib/tls/tls_client.h b/src/lib/tls/tls_client.h
index 09af053af..1b67a1022 100644
--- a/src/lib/tls/tls_client.h
+++ b/src/lib/tls/tls_client.h
@@ -127,6 +127,9 @@ class BOTAN_DLL Client final : public Channel
              const std::vector<std::string>& next_protocols = {}
          );
 
+      /**
+      * @return network protocol as advertised by the TLS server, if server sent the ALPN extension
+      */
       const std::string& application_protocol() const { return m_application_protocol; }
    private:
       void init(const Protocol_Version& protocol_version,