diff --git a/src/ed25519.rs b/src/ed25519.rs
index 3cb59d7..9fe85c3 100644
--- a/src/ed25519.rs
+++ b/src/ed25519.rs
@@ -68,7 +68,7 @@ pub const EXPANDED_SECRET_KEY_LENGTH: usize = EXPANDED_SECRET_KEY_KEY_LENGTH + E
 /// "detached"—that is, they do **not** include a copy of the message which has
 /// been signed.
 #[allow(non_snake_case)]
-#[derive(Copy)]
+#[derive(Copy, Eq, PartialEq)]
 #[repr(C)]
 pub struct Signature {
     /// `r` is an `EdwardsPoint`, formed by using an hash function with
@@ -104,20 +104,6 @@ impl Debug for Signature {
     }
 }
 
-impl Eq for Signature {}
-
-impl PartialEq for Signature {
-    fn eq(&self, other: &Signature) -> bool {
-        let mut equal: u8 = 0;
-
-        for i in 0..32 {
-            equal |= self.R.0[i] ^ other.R.0[i];
-            equal |= self.s[i]   ^ other.s[i];
-        }
-        equal == 0
-    }
-}
-
 impl Signature {
     /// Convert this `Signature` to a byte array.
     #[inline]