diff --git a/src/uint/boxed.rs b/src/uint/boxed.rs
index 348708fb..c1d10c62 100644
--- a/src/uint/boxed.rs
+++ b/src/uint/boxed.rs
@@ -55,7 +55,7 @@ pub struct BoxedUint {
 
 impl BoxedUint {
     fn limbs_for_precision(at_least_bits_precision: u32) -> usize {
-        ((at_least_bits_precision + Limb::BITS - 1) / Limb::BITS) as usize
+        at_least_bits_precision.div_ceil(Limb::BITS) as usize
     }
 
     /// Get the value `0` represented as succinctly as possible.
diff --git a/src/uint/boxed/div.rs b/src/uint/boxed/div.rs
index 0dd18c45..6f83ec04 100644
--- a/src/uint/boxed/div.rs
+++ b/src/uint/boxed/div.rs
@@ -152,7 +152,7 @@ impl BoxedUint {
 
         let dbits = rhs.bits();
         assert!(dbits > 0, "zero divisor");
-        let dwords = (dbits + Limb::BITS - 1) / Limb::BITS;
+        let dwords = dbits.div_ceil(Limb::BITS);
         let lshift = (Limb::BITS - (dbits % Limb::BITS)) % Limb::BITS;
 
         // Shift entire divisor such that the high bit is set