diff --git a/services/usb-device-xous/src/block_device.rs b/services/usb-device-xous/src/block_device.rs
new file mode 100644
index 000000000..6473e4932
--- /dev/null
+++ b/services/usb-device-xous/src/block_device.rs
@@ -0,0 +1,17 @@
+pub struct BlockDevice{}
+
+impl usbd_scsi::BlockDevice for BlockDevice {
+    const BLOCK_BYTES: usize = 512;
+
+    fn read_block(&self, lba: u32, block: &mut [u8]) -> Result<(), usbd_scsi::BlockDeviceError> {
+        Err(usbd_scsi::BlockDeviceError::HardwareError)
+    }
+
+    fn write_block(&mut self, lba: u32, block: &[u8]) -> Result<(), usbd_scsi::BlockDeviceError> {
+        Err(usbd_scsi::BlockDeviceError::WriteError)
+    }
+
+    fn max_lba(&self) -> u32 {
+        512
+    }
+}
\ No newline at end of file
diff --git a/services/usb-device-xous/src/main.rs b/services/usb-device-xous/src/main.rs
index b43ade7d6..d37dfc436 100644
--- a/services/usb-device-xous/src/main.rs
+++ b/services/usb-device-xous/src/main.rs
@@ -20,6 +20,8 @@ mod spinal_udc;
 use packed_struct::PackedStructSlice;
 #[cfg(any(feature="precursor", feature="renode"))]
 use spinal_udc::*;
+#[cfg(any(feature="precursor", feature="renode"))]
+mod block_device;
 
 #[cfg(not(target_os = "xous"))]
 mod hosted;