diff --git a/README.md b/README.md
index 766c700..f644ed5 100644
--- a/README.md
+++ b/README.md
@@ -33,8 +33,8 @@ void app_main(void)
 {
     esp_log_level_set("zh_ac_dimmer", ESP_LOG_NONE);
     zh_ac_dimmer_init_config_t config = ZH_AC_DIMMER_INIT_CONFIG_DEFAULT();
-    ac_dimmer_init_config.zero_cross_gpio = GPIO_NUM_16;
-    ac_dimmer_init_config.triac_gpio = GPIO_NUM_17;
+    config.zero_cross_gpio = GPIO_NUM_16;
+    config.triac_gpio = GPIO_NUM_17;
     zh_ac_dimmer_init(&config);
     zh_ac_dimmer_start();
     for (;;)