diff --git a/lib/MySQL_Monitor.cpp b/lib/MySQL_Monitor.cpp
index 6500625e5..2ea9f1ba3 100644
--- a/lib/MySQL_Monitor.cpp
+++ b/lib/MySQL_Monitor.cpp
@@ -607,9 +607,9 @@ void * monitor_read_only_thread(void *arg) {
 	while (mmsd->async_exit_status) {
 		mmsd->async_exit_status=wait_for_mysql(mmsd->mysql, mmsd->async_exit_status);
 		unsigned long long now=monotonic_time();
-		if (now > mmsd->t1 + mysql_thread___monitor_ping_timeout * 1000) {
+		if (now > mmsd->t1 + mysql_thread___monitor_read_only_timeout * 1000) {
 			mmsd->mysql_error_msg=strdup("timeout check");
-			proxy_error("Timeout on read_only check for %s:%d. If the server is overload, increase mysql-monitor_read_only_timeout. Assuming read_only=1\n", mmsd->hostname, mmsd->port);
+			proxy_error("Timeout on read_only check for %s:%d after %lldms. If the server is overload, increase mysql-monitor_read_only_timeout. Assuming read_only=1\n", mmsd->hostname, mmsd->port, now-mmsd->t1);
 			goto __exit_monitor_read_only_thread;
 		}
 		if (GloMyMon->shutdown==true) {
@@ -623,9 +623,9 @@ void * monitor_read_only_thread(void *arg) {
 	while (mmsd->async_exit_status) {
 		mmsd->async_exit_status=wait_for_mysql(mmsd->mysql, mmsd->async_exit_status);
 		unsigned long long now=monotonic_time();
-		if (now > mmsd->t1 + mysql_thread___monitor_ping_timeout * 1000) {
+		if (now > mmsd->t1 + mysql_thread___monitor_read_only_timeout * 1000) {
 			mmsd->mysql_error_msg=strdup("timeout check");
-			proxy_error("Timeout on read_only check for %s:%d. If the server is overload, increase mysql-monitor_read_only_timeout. Assuming read_only=1\n", mmsd->hostname, mmsd->port);
+			proxy_error("Timeout on read_only check for %s:%d after %lldms. If the server is overload, increase mysql-monitor_read_only_timeout. Assuming read_only=1\n", mmsd->hostname, mmsd->port, now-mmsd->t1);
 			goto __exit_monitor_read_only_thread;
 		}
 		if (GloMyMon->shutdown==true) {