1 files changed, 11 insertions, 0 deletions
diff --git a/crypto/src/asn1/util/FilterStream.cs b/crypto/src/asn1/util/FilterStream.cs
index e280bf5b5..f7e8708f3 100644
--- a/crypto/src/asn1/util/FilterStream.cs
+++ b/crypto/src/asn1/util/FilterStream.cs
@@ -34,10 +34,21 @@ namespace Org.BouncyCastle.Asn1.Utilities
             get { return s.Position; }
             set { s.Position = value; }
         }
+#if PORTABLE
+        protected override void Disposing(bool disposing)
+        {
+            if (disposing)
+            {
+                Platform.Dispose(s);
+            }
+            base.Dispose(disposing);
+        }
+#else
         public override void Close()
         {
             Platform.Dispose(s);
         }
+#endif
         public override void Flush()
         {
             s.Flush();