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>