diff --git a/ports/raspberrypi/boards/pimoroni_plasma2350/mpconfigboard.h b/ports/raspberrypi/boards/pimoroni_plasma2350/mpconfigboard.h
index 72b1e1d04399f..097cbd8baa301 100644
--- a/ports/raspberrypi/boards/pimoroni_plasma2350/mpconfigboard.h
+++ b/ports/raspberrypi/boards/pimoroni_plasma2350/mpconfigboard.h
@@ -5,7 +5,7 @@
 // SPDX-License-Identifier: MIT
 
 #define MICROPY_HW_BOARD_NAME "Pimoroni Plasma 2350"
-#define MICROPY_HW_MCU_NAME "rp2350b"
+#define MICROPY_HW_MCU_NAME "rp2350a"
 
 #define CIRCUITPY_RGB_STATUS_INVERTED_PWM
 #define CIRCUITPY_RGB_STATUS_R (&pin_GPIO16)
diff --git a/ports/raspberrypi/boards/pimoroni_plasma2350w/mpconfigboard.h b/ports/raspberrypi/boards/pimoroni_plasma2350w/mpconfigboard.h
index d9e62abb1edd2..576299d939cfb 100644
--- a/ports/raspberrypi/boards/pimoroni_plasma2350w/mpconfigboard.h
+++ b/ports/raspberrypi/boards/pimoroni_plasma2350w/mpconfigboard.h
@@ -5,7 +5,7 @@
 // SPDX-License-Identifier: MIT
 
 #define MICROPY_HW_BOARD_NAME "Pimoroni Plasma 2350W"
-#define MICROPY_HW_MCU_NAME "rp2350A"
+#define MICROPY_HW_MCU_NAME "rp2350a"
 
 #define CIRCUITPY_RGB_STATUS_INVERTED_PWM
 #define CIRCUITPY_RGB_STATUS_R (&pin_GPIO16)