diff --git a/components/mhz19b/mhz19b.c b/components/mhz19b/mhz19b.c
index d12a7388..3aa5c8ce 100644
--- a/components/mhz19b/mhz19b.c
+++ b/components/mhz19b/mhz19b.c
@@ -60,7 +60,9 @@ esp_err_t mhz19b_init(mhz19b_dev_t *dev, uart_port_t uart_port, gpio_num_t tx_gp
         .parity    = UART_PARITY_DISABLE,
         .stop_bits = UART_STOP_BITS_1,
         .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
-#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 3, 0)
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 0, 0)
+        .source_clk = UART_SCLK_DEFAULT,
+#elif ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 3, 0)
         .source_clk = UART_SCLK_APB,
 #endif
     };