diff --git a/lib/PubSubClient/src/PubSubClient.cpp b/lib/PubSubClient/src/PubSubClient.cpp
index 5932bdbee..11e1c874a 100644
--- a/lib/PubSubClient/src/PubSubClient.cpp
+++ b/lib/PubSubClient/src/PubSubClient.cpp
@@ -209,6 +209,7 @@ boolean PubSubClient::connect(const char *id, const char *user, const char *pass
 boolean PubSubClient::readByte(uint8_t * result) {
    uint32_t previousMillis = millis();
    while(!_client->available()) {
+     delay(1);  // Add esp8266 de-blocking (Tasmota #790)
      uint32_t currentMillis = millis();
      if(currentMillis - previousMillis >= ((int32_t) MQTT_SOCKET_TIMEOUT * 1000)){
        return false;