From f9c0c03445a16b6922ac481a69a51e1fb218609b Mon Sep 17 00:00:00 2001
From: david gauchard <gauchard@laas.fr>
Date: Tue, 11 Aug 2020 14:15:17 +0200
Subject: [PATCH] base64 class uses String, adding harmless #include

---
 cores/esp8266/base64.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cores/esp8266/base64.h b/cores/esp8266/base64.h
index 20f00f81fd..49a6cdfb01 100644
--- a/cores/esp8266/base64.h
+++ b/cores/esp8266/base64.h
@@ -25,6 +25,8 @@
 #ifndef CORE_BASE64_H_
 #define CORE_BASE64_H_
 
+#include <WString.h>
+
 class base64
 {
 public: