diff --git a/mcs/class/System/Mono.Net.Security/MobileAuthenticatedStream.cs b/mcs/class/System/Mono.Net.Security/MobileAuthenticatedStream.cs
index 7e743dc3cca7..496a620dc1d6 100644
--- a/mcs/class/System/Mono.Net.Security/MobileAuthenticatedStream.cs
+++ b/mcs/class/System/Mono.Net.Security/MobileAuthenticatedStream.cs
@@ -725,6 +725,9 @@ internal AsyncOperationStatus ProcessHandshake (AsyncOperationStatus status, boo
 		internal (int ret, bool wantMore) ProcessRead (BufferOffsetSize userBuffer)
 		{
 			lock (ioLock) {
+				if (xobileTlsContext == null)
+					return (0, false);
+
 				// This operates on the internal buffer and will never block.
 				if (operation != Operation.Authenticated)
 					throw GetInternalError ();
@@ -740,6 +743,9 @@ internal AsyncOperationStatus ProcessHandshake (AsyncOperationStatus status, boo
 		internal (int ret, bool wantMore) ProcessWrite (BufferOffsetSize userBuffer)
 		{
 			lock (ioLock) {
+				if (xobileTlsContext == null)
+					return (0, false);
+
 				// This operates on the internal buffer and will never block.
 				if (operation != Operation.Authenticated)
 					throw GetInternalError ();