diff --git a/esphome/components/sim800l/sim800l.cpp b/esphome/components/sim800l/sim800l.cpp
index 4f7aa228e9..38775b0062 100644
--- a/esphome/components/sim800l/sim800l.cpp
+++ b/esphome/components/sim800l/sim800l.cpp
@@ -324,7 +324,7 @@ void Sim800LComponent::parse_cmd_(std::string message) {
         this->sms_received_callback_.call(this->message_, this->sender_);
         this->state_ = STATE_RECEIVED_SMS;
       } else {
-        if (this->message_.length() > 0)
+        if (!this->message_.empty())
           this->message_ += "\n";
         this->message_ += message;
       }