diff --git a/src/bigint.rs b/src/bigint.rs
index 4451190..ca46895 100644
--- a/src/bigint.rs
+++ b/src/bigint.rs
@@ -140,7 +140,8 @@ impl BigInt {
     /// # Panics
     /// * If radix is not between 1 and 36 inclusive
     /// * Some branches are not yet implemented
-    pub fn from_str_radix<T: ToString + ?Sized>(s: &T, radix: usize) -> BigInt {
+    #[allow(clippy::needless_pass_by_value)]
+    pub fn from_str_radix<T: ToString>(s: T, radix: usize) -> BigInt {
         // Two lines due to borrow checker complaints
         let input = s.to_string().to_ascii_uppercase();
         let input = input.trim();