diff --git a/src/proxy/tinymitm/proxy.cpp b/src/proxy/tinymitm/proxy.cpp
index 336b6b9..dcc2f51 100644
--- a/src/proxy/tinymitm/proxy.cpp
+++ b/src/proxy/tinymitm/proxy.cpp
@@ -557,7 +557,7 @@ void TinyMITMProxy::handleClient(SOCKET clientSocket)
             {
                 if (tunnelMode)
                 {
-                    wolfSSL_write(clientSSL.get(), buf, rd);
+                    if (!sslWriteAll(clientSSL.get(), buf, rd, clientGuard)) break;
                 }
                 else
                 {