diff --git a/ArduinoCore-API b/ArduinoCore-API
index 8f747a4a5..b20f68b65 160000
--- a/ArduinoCore-API
+++ b/ArduinoCore-API
@@ -1 +1 @@
-Subproject commit 8f747a4a5756cbea5123b34bb7f65b043cb80c26
+Subproject commit b20f68b65c787eec78ef81762c85db999d2ce071
diff --git a/cores/rp2040/Arduino.h b/cores/rp2040/Arduino.h
index 1aef788ab..d932f10da 100644
--- a/cores/rp2040/Arduino.h
+++ b/cores/rp2040/Arduino.h
@@ -68,6 +68,7 @@ float analogReadTemp();  // Returns core temp in Centigrade
 // PWM
 void analogWrite(pin_size_t pinNumber, int value);
 
+// Timing
 void delay(unsigned long);
 void delayMicroseconds(unsigned int us);
 unsigned long millis();