diff --git a/esphome/components/micronova/text_sensor/micronova_text_sensor.cpp b/esphome/components/micronova/text_sensor/micronova_text_sensor.cpp
index 10ee5cbb740..eaf5cfa4263 100644
--- a/esphome/components/micronova/text_sensor/micronova_text_sensor.cpp
+++ b/esphome/components/micronova/text_sensor/micronova_text_sensor.cpp
@@ -22,9 +22,8 @@ void MicroNovaTextSensor::process_value_from_stove(int value_from_stove) {
   // Values past the table read as "Undefined alarm"
   const ProgmemStr name =
       StoveStateStrings::get_progmem_str(static_cast<uint8_t>(value_from_stove), StoveStateStrings::LAST_INDEX);
-  char text[20];
+  char text[StoveStateStrings::MAX_LENGTH + 1];
   ESPHOME_strncpy_P(text, reinterpret_cast<ESPHOME_PGM_P>(name), sizeof(text));
-  text[sizeof(text) - 1] = '\0';
   this->publish_state(text);
 }