diff --git a/server/modules/monitor/mariadbmon/mariadbmon.cc b/server/modules/monitor/mariadbmon/mariadbmon.cc
index 6a4bed111..f4355004c 100644
--- a/server/modules/monitor/mariadbmon/mariadbmon.cc
+++ b/server/modules/monitor/mariadbmon/mariadbmon.cc
@@ -958,12 +958,17 @@ void MariaDBMonitor::set_slave_heartbeat(MariaDBServer* server)
  *
  * @param setting_name Setting to disable
  */
-void MariaDBMonitor::disable_setting(const char* setting)
+void MariaDBMonitor::disable_setting(const std::string& setting)
 {
-    MXS_CONFIG_PARAMETER p = {};
-    p.name = const_cast<char*>(setting);
-    p.value = const_cast<char*>("false");
-    monitor_add_parameters(m_monitor, &p);
+    Worker* worker = static_cast<Worker*>(mxs_rworker_get(MXS_RWORKER_MAIN));
+
+    worker->post([=]()
+    {
+        MXS_CONFIG_PARAMETER p = {};
+        p.name = const_cast<char*>(setting.c_str());
+        p.value = const_cast<char*>("false");
+        monitor_add_parameters(m_monitor, &p);
+    }, NULL, EXECUTE_AUTO);
 }
 
 /**
diff --git a/server/modules/monitor/mariadbmon/mariadbmon.hh b/server/modules/monitor/mariadbmon/mariadbmon.hh
index 8a98c8285..59b154b61 100644
--- a/server/modules/monitor/mariadbmon/mariadbmon.hh
+++ b/server/modules/monitor/mariadbmon/mariadbmon.hh
@@ -264,7 +264,7 @@ private:
                                     int seconds_remaining);
 
     // Other methods
-    void disable_setting(const char* setting);
+    void disable_setting(const std::string& setting);
     bool check_sql_files();
     void enforce_read_only_on_slaves();
 };