1 files changed, 8 insertions, 1 deletions
diff --git a/crypto/src/cms/CMSSignedDataStreamGenerator.cs b/crypto/src/cms/CMSSignedDataStreamGenerator.cs
index f934b9259..3f2da5f7e 100644
--- a/crypto/src/cms/CMSSignedDataStreamGenerator.cs
+++ b/crypto/src/cms/CMSSignedDataStreamGenerator.cs
@@ -783,7 +783,14 @@ namespace Org.BouncyCastle.Cms
 				_out.Write(buffer, offset, count);
 			}
 
-			public override void WriteByte(byte value)
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+            public override void Write(ReadOnlySpan<byte> buffer)
+            {
+                _out.Write(buffer);
+            }
+#endif
+
+            public override void WriteByte(byte value)
 			{
 				_out.WriteByte(value);
 			}