diff --git a/components/driver/include/driver/sigmadelta.h b/components/driver/include/driver/sigmadelta.h
index 783baa1421..28906d069c 100644
--- a/components/driver/include/driver/sigmadelta.h
+++ b/components/driver/include/driver/sigmadelta.h
@@ -19,7 +19,7 @@
 #include "driver/gpio.h"
 #include "hal/sigmadelta_types.h"
 
-#ifdef _cplusplus
+#ifdef __cplusplus
 extern "C" {
 #endif