diff --git a/benches/x25519.rs b/benches/x25519.rs
index 292393c..9a8238b 100644
--- a/benches/x25519.rs
+++ b/benches/x25519.rs
@@ -30,7 +30,6 @@ fn bench_diffie_hellman(c: &mut Criterion) {
     let bob_public: EphemeralPublic = EphemeralPublic::from(&bob_secret);
 
     c.bench_function("diffie_hellman", move |b| {
-        let alice_secret: EphemeralSecret = EphemeralSecret::new(&mut csprng);
         b.iter_with_setup(
             || EphemeralSecret::new(&mut csprng),
             |alice_secret| EphemeralSecret::diffie_hellman(alice_secret, &bob_public),
diff --git a/src/x25519.rs b/src/x25519.rs
index 05590b1..ec3630f 100644
--- a/src/x25519.rs
+++ b/src/x25519.rs
@@ -25,6 +25,14 @@ use rand_core::CryptoRng;
 #[repr(C)]
 pub struct EphemeralPublic(pub (crate) MontgomeryPoint);
 
+impl From<[u8; 32]> for EphemeralPublic {
+    /// Given a byte array, construct an x25519 `EphemeralPublic` key
+    fn from(bytes: [u8; 32]) -> EphemeralPublic {
+        EphemeralPublic(MontgomeryPoint(bytes))
+    }
+
+}
+
 /// A DH ephemeral secret key.
 #[repr(C)]
 #[derive(Default)] // we derive Default in order to use the clear() method in Drop