diff --git a/include/haproxy/quic_openssl_compat.h b/include/haproxy/quic_openssl_compat.h
index 7147a6ff9..c153c7b4e 100644
--- a/include/haproxy/quic_openssl_compat.h
+++ b/include/haproxy/quic_openssl_compat.h
@@ -20,8 +20,7 @@
 #define QUIC_OPENSSL_COMPAT_CLIENT_APPLICATION   "CLIENT_TRAFFIC_SECRET_0"
 #define QUIC_OPENSSL_COMPAT_SERVER_APPLICATION   "SERVER_TRAFFIC_SECRET_0"
 
-void quic_tls_compat_msg_callback(struct connection *conn,
-                                  int write_p, int version, int content_type,
+void quic_tls_compat_msg_callback(int write_p, int version, int content_type,
                                   const void *buf, size_t len, SSL *ssl);
 int quic_tls_compat_init(struct bind_conf *bind_conf, SSL_CTX *ctx);
 void quic_tls_compat_keylog_callback(const SSL *ssl, const char *line);
diff --git a/src/quic_openssl_compat.c b/src/quic_openssl_compat.c
index 2e55c3ced..ce9ac252a 100644
--- a/src/quic_openssl_compat.c
+++ b/src/quic_openssl_compat.c
@@ -359,8 +359,7 @@ leave:
 }
 
 /* Callback use to parse TLS messages for <ssl> TLS session. */
-void quic_tls_compat_msg_callback(struct connection *conn,
-                                  int write_p, int version, int content_type,
+void quic_tls_compat_msg_callback(int write_p, int version, int content_type,
                                   const void *buf, size_t len, SSL *ssl)
 {
 	unsigned int alert;