diff --git a/STM32F1/libraries/SPI/examples/spi_slave/spi_slave.ino b/STM32F1/libraries/SPI/examples/spi_slave/spi_slave.ino
index 2a26c8b..64f8d50 100644
--- a/STM32F1/libraries/SPI/examples/spi_slave/spi_slave.ino
+++ b/STM32F1/libraries/SPI/examples/spi_slave/spi_slave.ino
@@ -29,7 +29,7 @@ void loop()
 {
   // Blocking call to read SPI message
   uint8_t msg = SPI.transfer(++count);
-  Serial.print("a Received = 0b");
+  Serial.print("Received = 0b");
   Serial.print(msg, BIN);
   Serial.print(", 0x");
   Serial.print(msg, HEX);