diff --git a/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_NANO.h b/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_NANO.h
index e9d84e664a..13724103f4 100644
--- a/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_NANO.h
+++ b/Marlin/src/pins/stm32f1/pins_MKS_ROBIN_NANO.h
@@ -192,7 +192,7 @@ https://sergey1560.github.io/fb4s_howto/mks_pwc/
 #endif
 
 #define SDIO_SUPPORT
-#define SDIO_CLOCK                       18000000  
+#define SDIO_CLOCK                       4500000  
 #define SD_DETECT_PIN                       PD12
 #define ONBOARD_SD_CS_PIN                   PC11