1 files changed, 1 insertions, 1 deletions

diff --git a/crypto/src/security/NoSuchAlgorithmException.cs b/crypto/src/security/NoSuchAlgorithmException.cs

index d120c5f77..c56ec651e 100644
--- a/crypto/src/security/NoSuchAlgorithmException.cs
+++ b/crypto/src/security/NoSuchAlgorithmException.cs
@@ -3,7 +3,7 @@ using System;
 namespace Org.BouncyCastle.Security
 {
 	[Obsolete("Never thrown")]
-#if !(NETCF_1_0 || NETCF_2_0 || SILVERLIGHT)
+#if !(NETCF_1_0 || NETCF_2_0 || SILVERLIGHT || PORTABLE)
     [Serializable]
 #endif
     public class NoSuchAlgorithmException : GeneralSecurityException