1 files changed, 5 insertions, 0 deletions
diff --git a/crypto/src/crypto/digests/ShakeDigest.cs b/crypto/src/crypto/digests/ShakeDigest.cs
index b38e29dc3..8d7a7d6e3 100644
--- a/crypto/src/crypto/digests/ShakeDigest.cs
+++ b/crypto/src/crypto/digests/ShakeDigest.cs
@@ -46,6 +46,11 @@ namespace Org.BouncyCastle.Crypto.Digests
             get { return "SHAKE" + fixedOutputLength; }
         }
 
+        public override int GetDigestSize()
+        {
+            return fixedOutputLength >> 2;
+        }
+
         public override int DoFinal(byte[] output, int outOff)
         {
             return DoFinal(output, outOff, GetDigestSize());