1 files changed, 2 insertions, 1 deletions

diff --git a/crypto/src/pqc/crypto/crystals/dilithium/Poly.cs b/crypto/src/pqc/crypto/crystals/dilithium/Poly.cs

index f5a6743df..9d94cce52 100644
--- a/crypto/src/pqc/crypto/crystals/dilithium/Poly.cs
+++ b/crypto/src/pqc/crypto/crystals/dilithium/Poly.cs
@@ -1,4 +1,5 @@
-using Org.BouncyCastle.Crypto.Digests;
+using System;
+using Org.BouncyCastle.Crypto.Digests;
 
 namespace Org.BouncyCastle.Pqc.Crypto.Crystals.Dilithium
 {