diff --git a/hardware/arduino/avr/cores/arduino/WString.h b/hardware/arduino/avr/cores/arduino/WString.h
index b04798087..4667a0ddf 100644
--- a/hardware/arduino/avr/cores/arduino/WString.h
+++ b/hardware/arduino/avr/cores/arduino/WString.h
@@ -89,6 +89,8 @@ public:
        #if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
 	String & operator = (String &&rval);
 	String & operator = (StringSumHelper &&rval);
+	auto begin() -> const char* { return c_str(); }
+	auto end() -> const char* { return c_str() + length(); }	
 	#endif
 
 	// concatenate (works w/ built-in types)