1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/src/pkix/PkixCertPathBuilderException.cs b/crypto/src/pkix/PkixCertPathBuilderException.cs
index 5a4944dd8..0f10179dd 100644
--- a/crypto/src/pkix/PkixCertPathBuilderException.cs
+++ b/crypto/src/pkix/PkixCertPathBuilderException.cs
@@ -7,7 +7,7 @@ namespace Org.BouncyCastle.Pkix
 	/// <summary>
 	/// Summary description for PkixCertPathBuilderException.
 	/// </summary>
-#if !(NETCF_1_0 || NETCF_2_0 || SILVERLIGHT)
+#if !(NETCF_1_0 || NETCF_2_0 || SILVERLIGHT || PORTABLE)
     [Serializable]
 #endif
     public class PkixCertPathBuilderException : GeneralSecurityException