2 files changed, 7 insertions, 6 deletions
diff --git a/src/fuse/mod.rs b/src/fuse/mod.rs
index a4c9f06..5893d79 100644
--- a/src/fuse/mod.rs
+++ b/src/fuse/mod.rs
@@ -12,13 +12,13 @@ pub mod mount;
 pub mod session;
 
 mod private_trait {
-    pub trait Operation<'o> {
-        type RequestBody: crate::proto::Structured<'o>;
-        type ReplyTail;
-    }
+    pub trait Sealed {}
 }
 
-use private_trait::Operation;
+pub trait Operation<'o>: private_trait::Sealed {
+    type RequestBody: crate::proto::Structured<'o>;
+    type ReplyTail;
+}
 
 pub type Op<'o, O = ops::Any> = (Request<'o, O>, Reply<'o, O>);
 
diff --git a/src/fuse/ops.rs b/src/fuse/ops.rs
index 4727d10..f715e12 100644
--- a/src/fuse/ops.rs
+++ b/src/fuse/ops.rs
@@ -18,8 +18,9 @@ use super::{
 
 macro_rules! op {
     { $name:ident $operation:tt } => {
-        pub struct $name(());
+        pub struct $name(std::convert::Infallible);
 
+        impl super::private_trait::Sealed for $name {}
         impl<'o> Operation<'o> for $name $operation
     };