diff --git a/boards/mro/x21-777/nuttx-config/include/board.h b/boards/mro/x21-777/nuttx-config/include/board.h
index fc1bb5de88..04cc6c1acd 100644
--- a/boards/mro/x21-777/nuttx-config/include/board.h
+++ b/boards/mro/x21-777/nuttx-config/include/board.h
@@ -281,5 +281,5 @@
 
 #define GPIO_SPI2_MISO   GPIO_SPI2_MISO_1
 #define GPIO_SPI2_MOSI   GPIO_SPI2_MOSI_1
-#define GPIO_SPI2_SCK    GPIO_SPI2_SCK_2
+#define GPIO_SPI2_SCK    GPIO_SPI2_SCK_3