diff --git a/benches/xor_bench.rs b/benches/xor_bench.rs
index a792a89..bfa57e4 100644
--- a/benches/xor_bench.rs
+++ b/benches/xor_bench.rs
@@ -7,7 +7,7 @@ use rand::prelude::random;
 use rand::rngs::StdRng;
 use rand::Rng;
 use rand::SeedableRng;
-use xorfilter::Xor8Builder;
+use xorfilter::xor8::Xor8Builder;
 
 const SIZE: usize = 1_000_000;
 
diff --git a/src/xor8_old.rs b/src/xor8_old.rs
index 5c4092e..1d6da86 100644
--- a/src/xor8_old.rs
+++ b/src/xor8_old.rs
@@ -186,7 +186,7 @@ where H: BuildHasher
     pub fn build(&mut self) -> Result<()> {
         match self.keys.take() {
             Some(keys) => {
-                let digests = keys.iter().map(|(k, _)| *k).collect::<Vec<u64>>();
+                let digests = keys.keys().copied().collect::<Vec<u64>>();
                 self.build_keys(&digests)
             }
             None => Ok(()),