2 files changed, 2 insertions, 0 deletions
diff --git a/src/libstd/sys/windows/c.rs b/src/libstd/sys/windows/c.rs
index 4d377341be3..d7e1a801030 100644
--- a/src/libstd/sys/windows/c.rs
+++ b/src/libstd/sys/windows/c.rs
@@ -295,6 +295,7 @@ pub struct WSADATA {
     pub szSystemStatus: [u8; WSASYS_STATUS_LEN + 1],
 }
 
+#[derive(Copy, Clone)]
 #[repr(C)]
 pub struct WSABUF {
     pub len: ULONG,
diff --git a/src/libstd/sys/windows/io.rs b/src/libstd/sys/windows/io.rs
index 9d8018fd5e8..5525d283252 100644
--- a/src/libstd/sys/windows/io.rs
+++ b/src/libstd/sys/windows/io.rs
@@ -2,6 +2,7 @@ use crate::marker::PhantomData;
 use crate::slice;
 use crate::sys::c;
 
+#[derive(Copy, Clone)]
 #[repr(transparent)]
 pub struct IoSlice<'a> {
     vec: c::WSABUF,