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-rw-r--r--src/libstd/sys/wasi/io.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstd/sys/wasi/io.rs b/src/libstd/sys/wasi/io.rs
index cc8f1e16fa0..a5bddad708b 100644
--- a/src/libstd/sys/wasi/io.rs
+++ b/src/libstd/sys/wasi/io.rs
@@ -29,6 +29,7 @@ impl<'a> IoSlice<'a> {
     }
 }
 
+#[repr(transparent)]
 pub struct IoSliceMut<'a> {
     vec: __wasi_iovec_t,
     _p: PhantomData<&'a mut [u8]>,