1 files changed, 6 insertions, 0 deletions
diff --git a/src/udp_wrap.cc b/src/udp_wrap.cc
index 4c7072f2a2b..b4c859e5947 100644
--- a/src/udp_wrap.cc
+++ b/src/udp_wrap.cc
@@ -149,6 +149,12 @@ void UDPWrap::Initialize(Local<Object> target,
   target->Set(env->context(),
               sendWrapString,
               swt->GetFunction(env->context()).ToLocalChecked()).FromJust();
+
+  Local<Object> constants = Object::New(env->isolate());
+  NODE_DEFINE_CONSTANT(constants, UV_UDP_IPV6ONLY);
+  target->Set(context,
+              env->constants_string(),
+              constants).FromJust();
 }