diff --git a/docs/log-message-tags/next-number b/docs/log-message-tags/next-number
index 2c7a84e8e4..6a5bdca5ee 100644
--- a/docs/log-message-tags/next-number
+++ b/docs/log-message-tags/next-number
@@ -1 +1 @@
-2534
+2536
diff --git a/modules/proxy/mod_proxy_ajp.c b/modules/proxy/mod_proxy_ajp.c
index 6fdc6d7068..e4cccdacde 100644
--- a/modules/proxy/mod_proxy_ajp.c
+++ b/modules/proxy/mod_proxy_ajp.c
@@ -762,7 +762,7 @@ static int proxy_ajp_handler(request_rec *r, proxy_worker *worker,
             if (worker->s->ping_timeout < 0) {
                 if (!ap_proxy_is_socket_connected(backend->sock)) {
                     backend->close = 1;
-                    ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO()
+                    ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02534)
                                   "socket check failed to %pI (%s)",
                                   worker->cp->addr, worker->s->hostname);
                     status = HTTP_SERVICE_UNAVAILABLE;
diff --git a/modules/proxy/mod_proxy_http.c b/modules/proxy/mod_proxy_http.c
index e7f7dd2320..f22018addd 100644
--- a/modules/proxy/mod_proxy_http.c
+++ b/modules/proxy/mod_proxy_http.c
@@ -1979,7 +1979,7 @@ static int proxy_http_handler(request_rec *r, proxy_worker *worker,
         if (worker->s->ping_timeout_set && worker->s->ping_timeout < 0 &&
             !ap_proxy_is_socket_connected(backend->sock)) {
             backend->close = 1;
-            ap_log_rerror(APLOG_MARK, APLOG_INFO, status, r, APLOGNO()
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, status, r, APLOGNO(02535)
                           "socket check failed to %pI (%s)",
                           worker->cp->addr, worker->s->hostname);
             retry++;