1 files changed, 1 insertions, 1 deletions
diff --git a/library/std/src/sys/unix/kernel_copy.rs b/library/std/src/sys/unix/kernel_copy.rs
index 81b081e0070..7d49bbdcbe0 100644
--- a/library/std/src/sys/unix/kernel_copy.rs
+++ b/library/std/src/sys/unix/kernel_copy.rs
@@ -495,7 +495,7 @@ impl<T: ?Sized + CopyRead> CopyRead for BufReader<T> {
     }
 }
 
-impl<T: CopyWrite> CopyWrite for BufWriter<T> {
+impl<T: ?Sized + CopyWrite> CopyWrite for BufWriter<T> {
     fn properties(&self) -> CopyParams {
         self.get_ref().properties()
     }