diff --git a/src/proxy/tinymitm/proxy.cpp b/src/proxy/tinymitm/proxy.cpp
index 3857f30..6c8b88c 100644
--- a/src/proxy/tinymitm/proxy.cpp
+++ b/src/proxy/tinymitm/proxy.cpp
@@ -345,8 +345,8 @@ void TinyMITMProxy::handleClient(SOCKET clientSocket)
 
     wolfSSL_UseSNI(remoteSSL.get(), WOLFSSL_SNI_HOST_NAME, host.c_str(), (unsigned short)host.size());
 
-    setNonBlocking(clientGuard);
-    setNonBlocking(remoteGuard);
+    setNonBlocking(clientGuard, true);
+    setNonBlocking(remoteGuard, true);
 
     if (!doHandshake(clientSSL.get(), clientGuard, true)) return;
     if (!doHandshake(remoteSSL.get(), remoteGuard, false)) return;