diff --git a/libraries/Servo/library.properties b/libraries/Servo/library.properties
index 44750b3fb..ef971e81d 100644
--- a/libraries/Servo/library.properties
+++ b/libraries/Servo/library.properties
@@ -6,4 +6,4 @@ sentence=Allows Arduino/Genuino boards to control a variety of servo motors.
 paragraph=This library can control a great number of servos.<br />It makes careful use of timers: the library can control 12 servos using only 1 timer.<br />On the Arduino Due you can control up to 60 servos.<br />
 category=Device Control
 url=http://www.arduino.cc/en/Reference/Servo
-architectures=nrf52
+architectures=otnrf52
diff --git a/libraries/SoftwareSerial/library.properties b/libraries/SoftwareSerial/library.properties
index 9a6a10e0e..5fdce5baf 100644
--- a/libraries/SoftwareSerial/library.properties
+++ b/libraries/SoftwareSerial/library.properties
@@ -6,4 +6,4 @@ sentence=Enables serial communication on digital pins.
 paragraph=The SoftwareSerial library has been developed to allow serial communication on any digital pin of the board, using software to replicate the functionality of the hardware UART. It is possible to have multiple software serial ports with speeds up to 115200 bps.
 category=Communication
 url=http://arduino.cc/en/Reference/SoftwareSerial
-architectures=nrf52
+architectures=otnrf52