diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
index 1c1cb09b0c..6a20a5ecfc 100644
--- a/Marlin/Configuration_adv.h
+++ b/Marlin/Configuration_adv.h
@@ -1744,7 +1744,7 @@
    * Multiple volume support - EXPERIMENTAL.
    * Adds 'M21 Pm' / 'M21 S' / 'M21 U' to mount SD Card / USB Drive.
    */
-  //#define MULTI_VOLUME
+  #define MULTI_VOLUME
   #if ENABLED(MULTI_VOLUME)
     #define VOLUME_SD_ONBOARD
     #define VOLUME_USB_FLASH_DRIVE