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Diffstat (limited to 'crypto/src/math/ec/custom/sec/SecT571FieldElement.cs')
-rw-r--r--crypto/src/math/ec/custom/sec/SecT571FieldElement.cs4
1 files changed, 3 insertions, 1 deletions
diff --git a/crypto/src/math/ec/custom/sec/SecT571FieldElement.cs b/crypto/src/math/ec/custom/sec/SecT571FieldElement.cs
index 5d5458412..c43b8dc3a 100644
--- a/crypto/src/math/ec/custom/sec/SecT571FieldElement.cs
+++ b/crypto/src/math/ec/custom/sec/SecT571FieldElement.cs
@@ -159,7 +159,9 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
 
         public override ECFieldElement Sqrt()
         {
-            return SquarePow(M - 1);
+            ulong[] z = Nat576.Create64();
+            SecT571Field.Sqrt(x, z);
+            return new SecT571FieldElement(z);
         }
 
         public virtual int Representation