diff --git a/esphome/components/uart/uart_component_esp_idf.cpp b/esphome/components/uart/uart_component_esp_idf.cpp
index 84bd48d530..8fae63a603 100644
--- a/esphome/components/uart/uart_component_esp_idf.cpp
+++ b/esphome/components/uart/uart_component_esp_idf.cpp
@@ -42,7 +42,7 @@ uart_config_t IDFUARTComponent::get_config_() {
       break;
   }
 
-  uart_config_t uart_config;
+  uart_config_t uart_config{};
   uart_config.baud_rate = this->baud_rate_;
   uart_config.data_bits = data_bits;
   uart_config.parity = parity;