diff --git a/libraries/Servo/src/Servo.h b/libraries/Servo/src/Servo.h
index 6b19a477bd..c9a3811744 100644
--- a/libraries/Servo/src/Servo.h
+++ b/libraries/Servo/src/Servo.h
@@ -50,6 +50,7 @@
 #define MAX_PULSE_WIDTH      2400     // the longest pulse sent to a servo 
 #define DEFAULT_PULSE_WIDTH  1500     // default pulse width when servo is attached
 #define REFRESH_INTERVAL    20000     // minumim time to refresh servos in microseconds 
+#define MAX_SERVOS             12
 
 #if !defined(ESP8266)