diff --git a/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.h b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.h
index 0b4f364633c143641117d16d1c99f7f679fb2e2c..a0e980cbf3377ae154e98cec1e5c02ce06e1e191 100644
--- a/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.h
+++ b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.h
@@ -50,7 +50,7 @@
 #define RTDUINO_SERIAL3_DEVICE_NAME             "uart3"
 
 /*
- * uart2 - PB13-SCK  PB14-MISO  PB15-MOSI
+ * spi2 - PB13-SCK  PB14-MISO  PB15-MOSI
  */
 #define RTDUINO_DEFAULT_SPI_BUS_NAME            "spi2"