diff --git a/src/biguint/shift.rs b/src/biguint/shift.rs
index 9fbeb02e..00326bb5 100644
--- a/src/biguint/shift.rs
+++ b/src/biguint/shift.rs
@@ -35,7 +35,7 @@ fn biguint_shl2(n: Cow<'_, BigUint>, digits: usize, shift: u8) -> BigUint {
 
     if shift > 0 {
         let mut carry = 0;
-        let carry_shift = big_digit::BITS as u8 - shift;
+        let carry_shift = big_digit::BITS - shift;
         for elem in data[digits..].iter_mut() {
             let new_carry = *elem >> carry_shift;
             *elem = (*elem << shift) | carry;
@@ -79,7 +79,7 @@ fn biguint_shr2(n: Cow<'_, BigUint>, digits: usize, shift: u8) -> BigUint {
 
     if shift > 0 {
         let mut borrow = 0;
-        let borrow_shift = big_digit::BITS as u8 - shift;
+        let borrow_shift = big_digit::BITS - shift;
         for elem in data.iter_mut().rev() {
             let new_borrow = *elem << borrow_shift;
             *elem = (*elem >> shift) | borrow;
diff --git a/tests/bigint.rs b/tests/bigint.rs
index 3144367f..75cf81ec 100644
--- a/tests/bigint.rs
+++ b/tests/bigint.rs
@@ -187,7 +187,7 @@ fn test_signed_bytes_le_round_trip() {
 
 #[test]
 fn test_cmp() {
-    let vs: [&[u32]; 4] = [&[2 as u32], &[1, 1], &[2, 1], &[1, 1, 1]];
+    let vs: [&[u32]; 4] = [&[2_u32], &[1, 1], &[2, 1], &[1, 1, 1]];
     let mut nums = Vec::new();
     for s in vs.iter().rev() {
         nums.push(BigInt::from_slice(Minus, *s));