diff --git a/boards/mro/ctrl-zero-f7/nuttx-config/include/board.h b/boards/mro/ctrl-zero-f7/nuttx-config/include/board.h
index 4e9b3c0493..e36a8a9e74 100644
--- a/boards/mro/ctrl-zero-f7/nuttx-config/include/board.h
+++ b/boards/mro/ctrl-zero-f7/nuttx-config/include/board.h
@@ -66,7 +66,7 @@
 
 #define STM32_BOARD_XTAL        24000000ul
 
-#define STM32_HSI_FREQUENCY     24000000ul
+#define STM32_HSI_FREQUENCY     16000000ul
 #define STM32_LSI_FREQUENCY     32000
 #define STM32_HSE_FREQUENCY     STM32_BOARD_XTAL
 #define STM32_LSE_FREQUENCY     0