1 files changed, 1 insertions, 3 deletions
diff --git a/crypto/src/cms/KeyAgreeRecipientInformation.cs b/crypto/src/cms/KeyAgreeRecipientInformation.cs
index 8843ede0d..398082810 100644
--- a/crypto/src/cms/KeyAgreeRecipientInformation.cs
+++ b/crypto/src/cms/KeyAgreeRecipientInformation.cs
@@ -208,11 +208,9 @@ namespace Org.BouncyCastle.Cms
         public override CmsTypedStream GetContentStream(
             ICipherParameters key)
         {
-            if (!(key is AsymmetricKeyParameter))
+            if (!(key is AsymmetricKeyParameter receiverPrivateKey))
                 throw new ArgumentException("KeyAgreement requires asymmetric key", "key");
 
-            AsymmetricKeyParameter receiverPrivateKey = (AsymmetricKeyParameter) key;
-
             if (!receiverPrivateKey.IsPrivate)
                 throw new ArgumentException("Expected private key", "key");