diff --git a/Cargo.toml b/Cargo.toml
index 8ef85ebc..8c2f729a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -38,7 +38,7 @@ features = ["all"]
 libc = "0.2.150"
 
 [target.'cfg(windows)'.dependencies.windows-sys]
-version = "0.52"
+version = "0.59"
 features = [
   "Win32_Foundation",
   "Win32_Networking_WinSock",
diff --git a/src/sys/windows.rs b/src/sys/windows.rs
index 11f2b7b0..b6c95e24 100644
--- a/src/sys/windows.rs
+++ b/src/sys/windows.rs
@@ -890,7 +890,8 @@ pub(crate) fn unix_sockaddr(path: &Path) -> io::Result<SockAddr> {
         storage.sun_family = crate::sys::AF_UNIX as sa_family_t;
         // `storage` was initialized to zero above, so the path is
         // already null terminated.
-        storage.sun_path[..bytes.len()].copy_from_slice(bytes);
+        storage.sun_path[..bytes.len()]
+            .copy_from_slice(unsafe { mem::transmute::<&[u8], &[i8]>(bytes) });
 
         let base = storage as *const _ as usize;
         let path = &storage.sun_path as *const _ as usize;