diff --git a/halo2-ecc/src/bls12_381/pairing.rs b/halo2-ecc/src/bls12_381/pairing.rs
index 39e08ed6..b46ebf57 100644
--- a/halo2-ecc/src/bls12_381/pairing.rs
+++ b/halo2-ecc/src/bls12_381/pairing.rs
@@ -429,7 +429,7 @@ impl<'chip, F: BigPrimeField> PairingChip<'chip, F> {
     ) -> FqPoint<F> {
         let mml = self.multi_miller_loop(ctx, pairs.to_vec());
         let fp12_chip = Fp12Chip::<F>::new(self.fp_chip);
-        let fe = fp12_chip.final_exp(ctx, mml.clone());
+        let fe = fp12_chip.final_exp(ctx, mml);
         fe
     }
 
diff --git a/halo2-ecc/src/ecc/hash_to_curve.rs b/halo2-ecc/src/ecc/hash_to_curve.rs
index 998c465e..7791d27c 100644
--- a/halo2-ecc/src/ecc/hash_to_curve.rs
+++ b/halo2-ecc/src/ecc/hash_to_curve.rs
@@ -162,8 +162,8 @@ pub trait HashToCurveInstructions<
         let x_frob = self.field_chip().conjugate(ctx, p.x);
         let y_frob = self.field_chip().conjugate(ctx, p.y);
 
-        let x = self.field_chip().mul(ctx, x_frob, psi_x.clone());
-        let y = self.field_chip().mul(ctx, y_frob, psi_y.clone());
+        let x = self.field_chip().mul(ctx, x_frob, psi_x);
+        let y = self.field_chip().mul(ctx, y_frob, psi_y);
 
         EcPoint::new(x, y)
     }
@@ -177,7 +177,7 @@ pub trait HashToCurveInstructions<
         // 1 / 2 ^ ((q-1)/3)
         let psi2_x = self.field_chip().load_constant(ctx, C::PSI2_X);
 
-        let x = self.field_chip().mul(ctx, p.x, psi2_x.clone());
+        let x = self.field_chip().mul(ctx, p.x, psi2_x);
         let y = self.field_chip().negate(ctx, p.y);
 
         EcPoint::new(x, y)