diff --git a/rust/crd/src/s3logdir.rs b/rust/crd/src/s3logdir.rs
index 22cc67ea..25337875 100644
--- a/rust/crd/src/s3logdir.rs
+++ b/rust/crd/src/s3logdir.rs
@@ -158,7 +158,11 @@ impl S3LogDir {
     }
 
     fn url(&self) -> String {
-        format!("s3a://{}/{}", self.bucket.bucket_name, self.prefix)
+        format!(
+            "s3a://{bucket_name}/{prefix}",
+            bucket_name = self.bucket.bucket_name,
+            prefix = self.prefix
+        );
     }
 
     pub fn volumes(&self) -> Result<Vec<Volume>, Error> {