From f50fd76b31d5f339a87595989f61ed3588394706 Mon Sep 17 00:00:00 2001
From: Luke Parker <lukeparker5132@gmail.com>
Date: Fri, 8 Jul 2022 16:05:17 -0400
Subject: [PATCH] Fix dalek_ff_group invert

---
 crypto/dalek-ff-group/src/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/dalek-ff-group/src/lib.rs b/crypto/dalek-ff-group/src/lib.rs
index f96d0210..96a68501 100644
--- a/crypto/dalek-ff-group/src/lib.rs
+++ b/crypto/dalek-ff-group/src/lib.rs
@@ -166,7 +166,7 @@ impl Field for Scalar {
   fn square(&self) -> Self { *self * self }
   fn double(&self) -> Self { *self + self }
   fn invert(&self) -> CtOption<Self> {
-    CtOption::new(Self(self.0.invert()), self.is_zero())
+    CtOption::new(Self(self.0.invert()), !self.is_zero())
   }
   fn sqrt(&self) -> CtOption<Self> { unimplemented!() }
   fn is_zero(&self) -> Choice { self.0.ct_eq(&DScalar::zero()) }