diff --git a/bigint/src/bigint.rs b/bigint/src/bigint.rs
index 6cf7486..7a9b02d 100644
--- a/bigint/src/bigint.rs
+++ b/bigint/src/bigint.rs
@@ -1068,6 +1068,7 @@ impl BigInt {
 
     /// Determines the fewest bits necessary to express the `BigInt`,
     /// not including the sign.
+    #[inline]
     pub fn bits(&self) -> usize {
         self.data.bits()
     }
diff --git a/bigint/src/biguint.rs b/bigint/src/biguint.rs
index b9dfa19..5248115 100644
--- a/bigint/src/biguint.rs
+++ b/bigint/src/biguint.rs
@@ -1049,6 +1049,7 @@ impl BigUint {
     }
 
     /// Determines the fewest bits necessary to express the `BigUint`.
+    #[inline]
     pub fn bits(&self) -> usize {
         if self.is_zero() {
             return 0;