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Diffstat (limited to 'crypto/src/math/ec/custom/sec/SecP521R1Field.cs')
-rw-r--r--crypto/src/math/ec/custom/sec/SecP521R1Field.cs2
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/src/math/ec/custom/sec/SecP521R1Field.cs b/crypto/src/math/ec/custom/sec/SecP521R1Field.cs
index 38b177c0d..cfe3202cd 100644
--- a/crypto/src/math/ec/custom/sec/SecP521R1Field.cs
+++ b/crypto/src/math/ec/custom/sec/SecP521R1Field.cs
@@ -152,7 +152,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
             Nat512.Square(x, zz);
 
             uint x16 = x[16];
-            zz[32] = Nat.MulWordAdd(16, x16 << 1, x, zz, 16) + (x16 * x16);
+            zz[32] = Nat.MulWordAddTo(16, x16 << 1, x, 0, zz, 16) + (x16 * x16);
         }
     }
 }