diff --git a/ports/stm32/boards/ARDUINO_GIGA/mpconfigboard.h b/ports/stm32/boards/ARDUINO_GIGA/mpconfigboard.h
index 2b86ce528e..99b92a3793 100644
--- a/ports/stm32/boards/ARDUINO_GIGA/mpconfigboard.h
+++ b/ports/stm32/boards/ARDUINO_GIGA/mpconfigboard.h
@@ -233,7 +233,7 @@ extern struct _spi_bdev_t spi_bdev;
 // Timing configuration for 200MHz/2=100MHz (10ns)
 #define MICROPY_HW_SDRAM_CLOCK_PERIOD       2
 #define MICROPY_HW_SDRAM_CAS_LATENCY        2
-#define MICROPY_HW_SDRAM_FREQUENCY          (100000) // 100 MHz
+#define MICROPY_HW_SDRAM_FREQUENCY_KHZ      (100000) // 100 MHz
 #define MICROPY_HW_SDRAM_TIMING_TMRD        (2)
 #define MICROPY_HW_SDRAM_TIMING_TXSR        (7)
 #define MICROPY_HW_SDRAM_TIMING_TRAS        (5)
diff --git a/ports/stm32/boards/ARDUINO_PORTENTA_H7/mpconfigboard.h b/ports/stm32/boards/ARDUINO_PORTENTA_H7/mpconfigboard.h
index 5442f74276..6b77b16093 100644
--- a/ports/stm32/boards/ARDUINO_PORTENTA_H7/mpconfigboard.h
+++ b/ports/stm32/boards/ARDUINO_PORTENTA_H7/mpconfigboard.h
@@ -247,7 +247,7 @@ extern struct _spi_bdev_t spi_bdev;
 // Timing configuration for 200MHz/2=100MHz (10ns)
 #define MICROPY_HW_SDRAM_CLOCK_PERIOD       2
 #define MICROPY_HW_SDRAM_CAS_LATENCY        2
-#define MICROPY_HW_SDRAM_FREQUENCY          (100000) // 100 MHz
+#define MICROPY_HW_SDRAM_FREQUENCY_KHZ      (100000) // 100 MHz
 #define MICROPY_HW_SDRAM_TIMING_TMRD        (2)
 #define MICROPY_HW_SDRAM_TIMING_TXSR        (7)
 #define MICROPY_HW_SDRAM_TIMING_TRAS        (5)