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-rw-r--r--src/libnative/io/file_win32.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/libnative/io/file_win32.rs b/src/libnative/io/file_win32.rs
index 88ba6dcbc7e..aae15a86614 100644
--- a/src/libnative/io/file_win32.rs
+++ b/src/libnative/io/file_win32.rs
@@ -174,7 +174,8 @@ impl rtio::RtioFileStream for FileDesc {
     fn tell(&self) -> Result<u64, IoError> {
         // This transmute is fine because our seek implementation doesn't
         // actually use the mutable self at all.
-        unsafe { cast::transmute_mut(self).seek(0, io::SeekCur) }
+        // FIXME #13933: Remove/justify all `&T` to `&mut T` transmutes
+        unsafe { cast::transmute::<&_, &mut FileDesc>(self).seek(0, io::SeekCur) }
     }
 
     fn fsync(&mut self) -> Result<(), IoError> {