diff --git a/block/src/async_io.rs b/block/src/async_io.rs
index 6b77d6a9c..3f37bd6e3 100644
--- a/block/src/async_io.rs
+++ b/block/src/async_io.rs
@@ -65,7 +65,7 @@ pub trait DiskFile: Send {
     ///
     /// The file descriptor is supposed to be used for `fcntl()` calls but no
     /// other operation.
-    fn fd(&mut self) -> BorrowedDiskFd;
+    fn fd(&mut self) -> BorrowedDiskFd<'_>;
 }
 
 #[derive(Error, Debug)]
diff --git a/block/src/lib.rs b/block/src/lib.rs
index 2ffd13a44..83b115af2 100644
--- a/block/src/lib.rs
+++ b/block/src/lib.rs
@@ -744,7 +744,7 @@ where
         Ok(())
     }
 
-    fn file(&mut self) -> MutexGuard<F>;
+    fn file(&mut self) -> MutexGuard<'_, F>;
 }
 
 pub enum ImageType {