diff --git a/tasmota/xdrv_02_mqtt.ino b/tasmota/xdrv_02_mqtt.ino
index c766ab247..2a15c33df 100644
--- a/tasmota/xdrv_02_mqtt.ino
+++ b/tasmota/xdrv_02_mqtt.ino
@@ -719,6 +719,16 @@ bool ButtonTopicActive(void)
   return ((strlen(key_topic) != 0) && strcmp(key_topic, "0"));
 }
 
+bool KeyTopicActive(uint32_t key)
+{
+  // key = 0 - Button topic
+  // key = 1 - Switch topic
+  key &= 1;
+  char key_topic[TOPSZ];
+  Format(key_topic, SettingsText(SET_MQTT_BUTTON_TOPIC + key), sizeof(key_topic));
+  return ((strlen(key_topic) != 0) && strcmp(key_topic, "0"));
+}
+
 /*********************************************************************************************\
  * Commands
 \*********************************************************************************************/