diff --git a/sonoff/_changelog.ino b/sonoff/_changelog.ino
index 65385f7460f7..ee9fb5155505 100644
--- a/sonoff/_changelog.ino
+++ b/sonoff/_changelog.ino
@@ -4,6 +4,7 @@
  * Add define WIFI_SOFT_AP_CHANNEL in my_user_config.h to set Soft Access Point Channel number between 1 and 13 as used by Wifi Manager web GUI (#4673)
  * Fix Alexa "this value is outside the range of the device". Needs power cycle and Alexa deletion/discovery cycle. (#3159, #4712)
  * Add define USE_MQTT_TLS_CA_CERT for checking MQTT TLS against root ca using Let's Encrypt cert from sonoff_letsencrypt.h - not supported with core 2.3.0 (#4703)
+ * Change FallbackTopic from cmnd/<mqttclient>/ to cmnd/<mqttclient>_fb/ to discriminate from Topic (#1528)
  *
  * 6.4.0.2 20181221
  * Fix possible dtostrf buffer overflows by increasing buffers
diff --git a/sonoff/sonoff.ino b/sonoff/sonoff.ino
index b262c7d9b04c..be5964a94148 100755
--- a/sonoff/sonoff.ino
+++ b/sonoff/sonoff.ino
@@ -245,20 +245,25 @@ char* GetOtaUrl(char *otaurl, size_t otaurl_size)
   return otaurl;
 }
 
-void GetTopic_P(char *stopic, byte prefix, char *topic, const char* subtopic)
+char* GetTopic_P(char *stopic, byte prefix, char *topic, const char* subtopic)
 {
   /* prefix 0 = Cmnd
      prefix 1 = Stat
      prefix 2 = Tele
+     prefix 4 = Cmnd fallback
+     prefix 5 = Stat fallback
+     prefix 6 = Tele fallback
   */
   char romram[CMDSZ];
   String fulltopic;
 
   snprintf_P(romram, sizeof(romram), subtopic);
-  if (fallback_topic_flag) {
+  if (fallback_topic_flag || (prefix > 3)) {
+    prefix &= 3;
     fulltopic = FPSTR(kPrefixes[prefix]);
     fulltopic += F("/");
     fulltopic += mqtt_client;
+    fulltopic += F("_fb");                    // cmnd/<mqttclient>_fb
   } else {
     fulltopic = Settings.mqtt_fulltopic;
     if ((0 == prefix) && (-1 == fulltopic.indexOf(F(MQTT_TOKEN_PREFIX)))) {
@@ -280,6 +285,12 @@ void GetTopic_P(char *stopic, byte prefix, char *topic, const char* subtopic)
   fulltopic.replace(F("//"), "/");
   if (!fulltopic.endsWith("/")) fulltopic += "/";
   snprintf_P(stopic, TOPSZ, PSTR("%s%s"), fulltopic.c_str(), romram);
+  return stopic;
+}
+
+char* GetFallbackTopic_P(char *stopic, byte prefix, const char* subtopic)
+{
+  return GetTopic_P(stopic, prefix +4, NULL, subtopic);
 }
 
 char* GetStateText(byte state)
@@ -467,8 +478,10 @@ void MqttDataHandler(char* topic, byte* data, unsigned int data_len)
   if (XdrvMqttData(topicBuf, sizeof(topicBuf), dataBuf, sizeof(dataBuf))) return;
 
   grpflg = (strstr(topicBuf, Settings.mqtt_grptopic) != NULL);
-  snprintf_P(stemp1, sizeof(stemp1), PSTR(D_CMND "/%s/"), mqtt_client);  // Full Fallback topic = cmnd/DVES_xxxxxxxx
+
+  GetFallbackTopic_P(stemp1, CMND, "");  // Full Fallback topic = cmnd/DVES_xxxxxxxx_fb/
   fallback_topic_flag = (!strncmp(topicBuf, stemp1, strlen(stemp1)));
+
   type = strrchr(topicBuf, '/');  // Last part of received topic is always the command (type)
 
   index = 1;
@@ -2742,8 +2755,9 @@ void setup(void)
   }
   blink_powersave = power;
 
-  snprintf_P(log_data, sizeof(log_data), PSTR(D_PROJECT " %s %s (" D_CMND_TOPIC " %s, " D_FALLBACK " %s, " D_CMND_GROUPTOPIC " %s) " D_VERSION " %s%s-" ARDUINO_ESP8266_RELEASE),
-    PROJECT, Settings.friendlyname[0], mqtt_topic, mqtt_client, Settings.mqtt_grptopic, my_version, my_image);
+  char stopic[TOPSZ];
+  snprintf_P(log_data, sizeof(log_data), PSTR(D_PROJECT " %s %s " D_VERSION " %s%s-" ARDUINO_ESP8266_RELEASE),
+    PROJECT, Settings.friendlyname[0], my_version, my_image);
   AddLog(LOG_LEVEL_INFO);
 #ifdef BE_MINIMAL
   snprintf_P(log_data, sizeof(log_data), PSTR(D_WARNING_MINIMAL_VERSION));
diff --git a/sonoff/xdrv_01_webserver.ino b/sonoff/xdrv_01_webserver.ino
index bd76b3c0e95c..046181283cd3 100644
--- a/sonoff/xdrv_01_webserver.ino
+++ b/sonoff/xdrv_01_webserver.ino
@@ -1323,13 +1323,12 @@ void HandleInformation(void)
   if (Settings.flag.mqtt_enabled) {
     func += F("}1" D_MQTT_HOST "}2"); func += Settings.mqtt_host;
     func += F("}1" D_MQTT_PORT "}2"); func += String(Settings.mqtt_port);
-    func += F("}1" D_MQTT_CLIENT " &<br/>&nbsp;" D_FALLBACK_TOPIC "}2"); func += mqtt_client;
     func += F("}1" D_MQTT_USER "}2"); func += Settings.mqtt_user;
+    func += F("}1" D_MQTT_CLIENT "}2"); func += mqtt_client;
     func += F("}1" D_MQTT_TOPIC "}2"); func += Settings.mqtt_topic;
     func += F("}1" D_MQTT_GROUP_TOPIC "}2"); func += Settings.mqtt_grptopic;
-    GetTopic_P(stopic, CMND, mqtt_topic, "");
-    func += F("}1" D_MQTT_FULL_TOPIC "}2"); func += stopic;
-
+    func += F("}1" D_MQTT_FULL_TOPIC "}2"); func += GetTopic_P(stopic, CMND, mqtt_topic, "");
+    func += F("}1" D_MQTT " " D_FALLBACK_TOPIC "}2"); func += GetFallbackTopic_P(stopic, CMND, "");
   } else {
     func += F("}1" D_MQTT "}2" D_DISABLED);
   }
diff --git a/sonoff/xdrv_02_mqtt.ino b/sonoff/xdrv_02_mqtt.ino
index a19f80f826e3..e3f848ce8e95 100644
--- a/sonoff/xdrv_02_mqtt.ino
+++ b/sonoff/xdrv_02_mqtt.ino
@@ -406,9 +406,7 @@ void MqttConnected(void)
     if (strstr(Settings.mqtt_fulltopic, MQTT_TOKEN_TOPIC) != NULL) {
       GetTopic_P(stopic, CMND, Settings.mqtt_grptopic, PSTR("#"));
       MqttSubscribe(stopic);
-      fallback_topic_flag = 1;
-      GetTopic_P(stopic, CMND, mqtt_client, PSTR("#"));
-      fallback_topic_flag = 0;
+      GetFallbackTopic_P(stopic, CMND, PSTR("#"));
       MqttSubscribe(stopic);
     }
 
@@ -417,7 +415,8 @@ void MqttConnected(void)
 
   if (mqtt_initial_connection_state) {
     snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("{\"" D_CMND_MODULE "\":\"%s\",\"" D_JSON_VERSION "\":\"%s%s\",\"" D_JSON_FALLBACKTOPIC "\":\"%s\",\"" D_CMND_GROUPTOPIC "\":\"%s\"}"),
-      my_module.name, my_version, my_image, mqtt_client, Settings.mqtt_grptopic);
+      my_module.name, my_version, my_image, GetFallbackTopic_P(stopic, CMND, ""), Settings.mqtt_grptopic);
+//      my_module.name, my_version, my_image, mqtt_client, Settings.mqtt_grptopic);
     MqttPublishPrefixTopic_P(TELE, PSTR(D_RSLT_INFO "1"));
 #ifdef USE_WEBSERVER
     if (Settings.webserver) {