diff --git a/README.md b/README.md
index 8689d233..5ac65bb0 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ RadioLib was originally created as a driver for [__RadioShield__](https://github
 * __Arduino AVR boards__ - tested on Uno, Mega and Leonardo
 * __ESP8266 boards__ - NodeMCU, Wemos D1, etc.
 * __ESP32 boards__ - tested on ESP-WROOM-32
-* __STM32 boards__ - tested on BluePill F103C6
+* __STM32 boards__ - tested on BluePill F103C8, STM32VL-Discovery F100RB (with [custom definitions](https://github.com/stm32duino/wiki/wiki/Custom-definitions) in variant.h)
 * __SAMD boards__ - Arduino Zero
 
 ### In development: