1 files changed, 1 insertions, 1 deletions

diff --git a/crypto/src/math/ec/custom/sec/SecP224R1Field.cs b/crypto/src/math/ec/custom/sec/SecP224R1Field.cs

index 1cb3fe352..f2b9eda64 100644
--- a/crypto/src/math/ec/custom/sec/SecP224R1Field.cs
+++ b/crypto/src/math/ec/custom/sec/SecP224R1Field.cs
@@ -32,7 +32,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
 
         public static void AddOne(uint[] x, uint[] z)
         {
-            Array.Copy(x, 0, z, 0, 6);
+            Nat224.Copy(x, z);
             uint c = Nat224.Inc(z, 0);
             if (c != 0 || (z[6] == P6 && Nat224.Gte(z, P)))
             {