diff --git a/CHANGELOG.md b/CHANGELOG.md
index 82d9731b..37da05df 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ HEAD
 
 * Added `measureJson()` to the `ArduinoJson` namespace (PR #1069 by @nomis)
 * Fixed example `JsonConfigFile.ino` for ESP8266
+* Include `Arduino.h` if `ARDUINO` is defined (PR #1071 by @nomis)
 
 v6.11.3 (2019-07-22)
 -------
diff --git a/src/ArduinoJson/Configuration.hpp b/src/ArduinoJson/Configuration.hpp
index 6e97b15d..1c49ac35 100644
--- a/src/ArduinoJson/Configuration.hpp
+++ b/src/ArduinoJson/Configuration.hpp
@@ -90,6 +90,8 @@
 
 #ifdef ARDUINO
 
+#include <Arduino.h>
+
 // Enable support for Arduino's String class
 #ifndef ARDUINOJSON_ENABLE_ARDUINO_STRING
 #define ARDUINOJSON_ENABLE_ARDUINO_STRING 1
@@ -107,17 +109,17 @@
 
 #else  // ARDUINO
 
-// Enable support for Arduino's String class
+// Disable support for Arduino's String class
 #ifndef ARDUINOJSON_ENABLE_ARDUINO_STRING
 #define ARDUINOJSON_ENABLE_ARDUINO_STRING 0
 #endif
 
-// Enable support for Arduino's Stream class
+// Disable support for Arduino's Stream class
 #ifndef ARDUINOJSON_ENABLE_ARDUINO_STREAM
 #define ARDUINOJSON_ENABLE_ARDUINO_STREAM 0
 #endif
 
-// Enable support for Arduino's Print class
+// Disable support for Arduino's Print class
 #ifndef ARDUINOJSON_ENABLE_ARDUINO_PRINT
 #define ARDUINOJSON_ENABLE_ARDUINO_PRINT 0
 #endif