diff --git a/components/driver/include/driver/sdmmc_types.h b/components/driver/include/driver/sdmmc_types.h
index dfbd2439c..d9ffde3ff 100644
--- a/components/driver/include/driver/sdmmc_types.h
+++ b/components/driver/include/driver/sdmmc_types.h
@@ -113,7 +113,7 @@ typedef struct {
     int max_freq_khz;           /*!< max frequency supported by the host */
 #define SDMMC_FREQ_DEFAULT      20000       /*!< SD/MMC Default speed (limited by clock divider) */
 #define SDMMC_FREQ_HIGHSPEED    40000       /*!< SD High speed (limited by clock divider) */
-#define SDMMC_FREQ_PROBING      4000        /*!< SD/MMC probing speed */
+#define SDMMC_FREQ_PROBING      400         /*!< SD/MMC probing speed */
     float io_voltage;           /*!< I/O voltage used by the controller (voltage switching is not supported) */
     esp_err_t (*init)(void);    /*!< Host function to initialize the driver */
     esp_err_t (*set_bus_width)(int slot, size_t width);    /*!< host function to set bus width */