diff --git a/core.cpp b/core.cpp
index 09af04b28..88b395d11 100644
--- a/core.cpp
+++ b/core.cpp
@@ -63,7 +63,7 @@ Core::~Core()
 
 void Core::start()
 {
-    tox = tox_new(1);
+    tox = tox_new(0); // IPv6 causes some weird routers to crash, according to anon
     if (tox == nullptr)
     {
         qCritical() << "Tox core failed to start";