diff --git a/components/driver/include/driver/sigmadelta.h b/components/driver/include/driver/sigmadelta.h
index 93388f0de..f343dc74c 100644
--- a/components/driver/include/driver/sigmadelta.h
+++ b/components/driver/include/driver/sigmadelta.h
@@ -101,7 +101,7 @@ esp_err_t sigmadelta_set_prescale(sigmadelta_channel_t channel, uint8_t prescale
  */
 esp_err_t sigmadelta_set_pin(sigmadelta_channel_t channel, gpio_num_t gpio_num);
 
-#ifdef _cplusplus
+#ifdef __cplusplus
 }
 #endif