diff --git a/services/usb-device-xous/src/main_hosted.rs b/services/usb-device-xous/src/main_hosted.rs
index 0d55100ba..4968fc6dd 100644
--- a/services/usb-device-xous/src/main_hosted.rs
+++ b/services/usb-device-xous/src/main_hosted.rs
@@ -97,12 +97,15 @@ pub(crate) fn main_hosted() -> ! {
         let opcode: Option<Opcode> = FromPrimitive::from_usize(msg.body.id());
         log::debug!("{:?}", opcode);
         match opcode {
+            #[cfg(feature="mass-storage")]
             Some(Opcode::SetBlockDevice) => {
                 log::info!("ignoring SetBlockDevice in hosted mode");
             },
+            #[cfg(feature="mass-storage")]
             Some(Opcode::SetBlockDeviceSID) => {
                 log::info!("ignoring SetBlockDeviceSID in hosted mode");
             },
+            #[cfg(feature="mass-storage")]
             Some(Opcode::ResetBlockDevice) => {
                 log::info!("ignoring ResetBlockDevice in hosted mode");
             },