1 files changed, 3 insertions, 0 deletions

diff --git a/crypto/src/math/ec/multiplier/ReferenceMultiplier.cs b/crypto/src/math/ec/multiplier/ReferenceMultiplier.cs

index 4848ada39..40563cdc7 100644
--- a/crypto/src/math/ec/multiplier/ReferenceMultiplier.cs
+++ b/crypto/src/math/ec/multiplier/ReferenceMultiplier.cs
@@ -1,5 +1,8 @@
+using System;
+
 namespace Org.BouncyCastle.Math.EC.Multiplier
 {
+    [Obsolete("Will be removed")]
     public class ReferenceMultiplier
         : AbstractECMultiplier
     {