1 files changed, 1 insertions, 1 deletions

diff --git a/crypto/src/crypto/macs/VMPCMac.cs b/crypto/src/crypto/macs/VMPCMac.cs

index 89916355c..6f2da075c 100644
--- a/crypto/src/crypto/macs/VMPCMac.cs
+++ b/crypto/src/crypto/macs/VMPCMac.cs
@@ -166,7 +166,7 @@ namespace Org.BouncyCastle.Crypto.Macs
 
 			for (int i = 0; i < len; i++)
 			{
-				Update(input[i]);
+				Update(input[inOff + i]);
 			}
 		}
 	}