diff --git a/src/bsd.rs b/src/bsd.rs
index d12fcfb..42445e8 100644
--- a/src/bsd.rs
+++ b/src/bsd.rs
@@ -187,7 +187,7 @@ fn sockaddr_len(af: AddressFamily) -> Result<usize> {
         _ => {
             return Err(Error::new(
                 ErrorKind::InvalidInput,
-                "Unsupported address family {af:?}",
+                format!("Unsupported address family {af:?}"),
             ))
         }
     };