1 files changed, 3 insertions, 2 deletions
diff --git a/src/librustc_data_structures/array_vec.rs b/src/librustc_data_structures/array_vec.rs
index c107b4a539a..57fc78ef531 100644
--- a/src/librustc_data_structures/array_vec.rs
+++ b/src/librustc_data_structures/array_vec.rs
@@ -138,7 +138,7 @@ impl<A: Array> ArrayVec<A> {
             // Use the borrow in the IterMut to indicate borrowing behavior of the
             // whole Drain iterator (like &mut T).
             let range_slice = {
-                let arr = &mut self.values as &mut [ManuallyDrop<_>];
+                let arr = &mut self.values as &mut [ManuallyDrop<<A as Array>::Element>];
                 slice::from_raw_parts_mut(arr.as_mut_ptr().offset(start as isize),
                                           end - start)
             };
@@ -260,7 +260,8 @@ impl<'a, A: Array> Drop for Drain<'a, A> {
                 let start = source_array_vec.len();
                 let tail = self.tail_start;
                 {
-                    let arr = &mut source_array_vec.values as &mut [ManuallyDrop<_>];
+                    let arr =
+                        &mut source_array_vec.values as &mut [ManuallyDrop<<A as Array>::Element>];
                     let src = arr.as_ptr().offset(tail as isize);
                     let dst = arr.as_mut_ptr().offset(start as isize);
                     ptr::copy(src, dst, self.tail_len);