diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index 61c3faf5f31c..f7b36037cd5d 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -2597,7 +2597,6 @@
  * you must uncomment the following option or it won't work.
  */
 #define SDSUPPORT
-#define ONBOARD_SDIO // seems required even with SDCARD_CONNECTION ONBOARD
 
 /**
  * SD CARD: ENABLE CRC
diff --git a/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h b/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h
index b913532fbbdd..8bbc32fde6f5 100644
--- a/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h
+++ b/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h
@@ -160,7 +160,15 @@
   #define LCD_BRIGHTNESS_DEFAULT TFT_BACKLIGHT_PWM
 #endif
 
-#if ENABLED(ONBOARD_SDIO)
+//
+// SD Support
+//
+#ifndef SDCARD_CONNECTION
+  #define SDCARD_CONNECTION              ONBOARD
+#endif
+
+#if SD_CONNECTION_IS(ONBOARD)
+  #define ONBOARD_SDIO
   #define SD_SS_PIN                         -1    // else SDSS set to PA4 in M43 (spi_pins.h)
 #endif