diff --git a/configs/open1788/include/board.h b/configs/open1788/include/board.h
index 3bcd00bc63b..53392bed293 100644
--- a/configs/open1788/include/board.h
+++ b/configs/open1788/include/board.h
@@ -152,21 +152,21 @@
  */
 
 #define SDCARD_CLKDIV_INIT         74   /* 400Khz  */
-#define SDCARD_INIT_CLKDIV         (SDCARD_CLKDIV_INIT+1)
+#define SDCARD_INIT_CLKDIV         (SDCARD_CLKDIV_INIT)
 
 #define SDCARD_NORMAL_CLKDIV       1    /* DMA ON:  SDCARD_CLOCK=15MHz */
 #define SDCARD_SLOW_CLKDIV         2    /* DMA OFF: SDCARD_CLOCK=10MHz */
 
 #ifdef CONFIG_SDIO_DMA
-#  define SDCARD_MMCXFR_CLKDIV     (SDCARD_NORMAL_CLKDIV+1)
+#  define SDCARD_MMCXFR_CLKDIV     (SDCARD_NORMAL_CLKDIV)
 #else
-#  define SDCARD_MMCXFR_CLKDIV     (SDCARD_SLOW_CLKDIV+1)
+#  define SDCARD_MMCXFR_CLKDIV     (SDCARD_SLOW_CLKDIV)
 #endif
 
 #ifdef CONFIG_SDIO_DMA
-#  define SDCARD_SDXFR_CLKDIV      (SDCARD_NORMAL_CLKDIV+1)
+#  define SDCARD_SDXFR_CLKDIV      (SDCARD_NORMAL_CLKDIV)
 #else
-#  define SDCARD_SDXFR_CLKDIV      (SDCARD_SLOW_CLKDIV+1)
+#  define SDCARD_SDXFR_CLKDIV      (SDCARD_SLOW_CLKDIV)
 #endif
 
 /* Set EMC delay values: