diff --git a/shared/bls/bls.go b/shared/bls/bls.go
index 89326c7fae..c240cc73cc 100644
--- a/shared/bls/bls.go
+++ b/shared/bls/bls.go
@@ -153,10 +153,8 @@ func (p *PublicKey) Marshal() []byte {
 
 // Copy the public key to a new pointer reference.
 func (p *PublicKey) Copy() (*PublicKey, error) {
-	rawBytes := p.p.Serialize()
-	newKey := &bls12.PublicKey{}
-	err := newKey.Deserialize(rawBytes)
-	return &PublicKey{p: newKey}, err
+	np := *p.p
+	return &PublicKey{p: &np}, nil
 }
 
 // Aggregate two public keys.
diff --git a/shared/bls/bls_test.go b/shared/bls/bls_test.go
index eca0d320ce..d50f956c90 100644
--- a/shared/bls/bls_test.go
+++ b/shared/bls/bls_test.go
@@ -278,3 +278,15 @@ func TestSignatureFromBytes(t *testing.T) {
 		})
 	}
 }
+
+func TestPublicKey_Copy(t *testing.T) {
+	pubkeyA := bls.RandKey().PublicKey()
+	pubkeyBytes := pubkeyA.Marshal()
+
+	pubkeyB, _ := pubkeyA.Copy()
+	pubkeyB.Aggregate(bls.RandKey().PublicKey())
+
+	if !bytes.Equal(pubkeyA.Marshal(), pubkeyBytes) {
+		t.Fatal("Pubkey was mutated after copy")
+	}
+}
\ No newline at end of file