diff --git a/src/lexical/math.rs b/src/lexical/math.rs
index 0925d0c9a..37cc1d24a 100644
--- a/src/lexical/math.rs
+++ b/src/lexical/math.rs
@@ -594,7 +594,7 @@ mod large {
 
         // Iteratively add elements from y to x.
         let mut carry = false;
-        for (xi, yi) in (&mut x[xstart..]).iter_mut().zip(y.iter()) {
+        for (xi, yi) in x[xstart..].iter_mut().zip(y.iter()) {
             // Only one op of the two can overflow, since we added at max
             // Limb::max_value() + Limb::max_value(). Add the previous carry,
             // and store the current carry for the next.