From 62b366a5ec4edc7b7dec0b8ad4089b5bafcf1f90 Mon Sep 17 00:00:00 2001
From: Otto Winter <otto@otto-winter.com>
Date: Tue, 1 Feb 2022 13:05:59 +0100
Subject: [PATCH] Fix ESP32C3 toolchain requires stdarg import in helpers
 (#3151)

---
 esphome/core/helpers.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/esphome/core/helpers.cpp b/esphome/core/helpers.cpp
index 05c86f86bb..6d399c4064 100644
--- a/esphome/core/helpers.cpp
+++ b/esphome/core/helpers.cpp
@@ -8,6 +8,7 @@
 #include <cctype>
 #include <cmath>
 #include <cstring>
+#include <cstdarg>
 
 #if defined(USE_ESP8266)
 #include <osapi.h>