diff --git a/fastfield_codecs/benches/bench.rs b/fastfield_codecs/benches/bench.rs
index d56cbc51e..5546d2af7 100644
--- a/fastfield_codecs/benches/bench.rs
+++ b/fastfield_codecs/benches/bench.rs
@@ -100,8 +100,8 @@ mod tests {
 
     fn get_u128_column_from_data(data: &[u128]) -> Arc<dyn Column<u128>> {
         let mut out = vec![];
-        let iter = || data.iter().cloned();
-        serialize_u128(iter, data.len() as u64, &mut out).unwrap();
+        let iter_gen = || data.iter().cloned();
+        serialize_u128(iter_gen, data.len() as u64, &mut out).unwrap();
         let out = OwnedBytes::new(out);
         open_u128::<u128>(out).unwrap()
     }