1 files changed, 1 insertions, 1 deletions

diff --git a/crypto/src/util/io/StreamOverflowException.cs b/crypto/src/util/io/StreamOverflowException.cs

index d8fcb558c..36d21e23e 100644
--- a/crypto/src/util/io/StreamOverflowException.cs
+++ b/crypto/src/util/io/StreamOverflowException.cs
@@ -3,7 +3,7 @@ using System.IO;
 
 namespace Org.BouncyCastle.Utilities.IO
 {
-#if !(NETCF_1_0 || NETCF_2_0 || SILVERLIGHT)
+#if !(NETCF_1_0 || NETCF_2_0 || SILVERLIGHT || PORTABLE)
     [Serializable]
 #endif
     public class StreamOverflowException