diff --git a/nx/include/switch/runtime/devices/fs_dev.h b/nx/include/switch/runtime/devices/fs_dev.h
index 50e84866..d00ecd48 100644
--- a/nx/include/switch/runtime/devices/fs_dev.h
+++ b/nx/include/switch/runtime/devices/fs_dev.h
@@ -25,10 +25,13 @@ typedef struct
 /// Initializes and mounts the sdmc device if accessible. Also initializes current working directory to point to the folder containing the path to the executable (argv[0]), if it is provided by the environment.
 Result fsdevMountSdmc(void);
 
-/// Mounts the input fs with the specified device name. fsdev will handle closing the fs when required, including when fsdevMountDevice() fails.
+/// Mounts the input fs with the specified device name. fsdev will handle closing the fs when required (this can be avoided by unmounting it with fsdevDeleteDevice), including when fsdevMountDevice() fails.
 /// Returns -1 when any errors occur.
 int fsdevMountDevice(const char *name, FsFileSystem fs);
 
+/// Unmounts the specified device without closing its fs service.
+int fsdevDeleteDevice(const char *name);
+
 /// Unmounts the specified device.
 int fsdevUnmountDevice(const char *name);