diff --git a/src/udp_wrap.cc b/src/udp_wrap.cc
index 6a32ebd1c3d880..1f67296076bb25 100644
--- a/src/udp_wrap.cc
+++ b/src/udp_wrap.cc
@@ -234,9 +234,8 @@ void UDPWrap::BufferSize(const FunctionCallbackInfo<Value>& args) {
 
   CHECK(args[0]->IsUint32());
   CHECK(args[1]->IsUint32());
-  int size = static_cast<int>(args[0].As<Uint32>()->Value());
 
-  if (size != args[0].As<Uint32>()->Value()) {
+  if (!args[0]->IsInt32()) {
     if (args[1].As<Uint32>()->Value() == 0)
       return env->ThrowUVException(EINVAL, "uv_recv_buffer_size");
     else
@@ -244,6 +243,7 @@ void UDPWrap::BufferSize(const FunctionCallbackInfo<Value>& args) {
   }
 
   int err;
+  int size = static_cast<int>(args[0].As<Uint32>()->Value());
   if (args[1].As<Uint32>()->Value() == 0) {
     err = uv_recv_buffer_size(reinterpret_cast<uv_handle_t*>(&wrap->handle_),
                               &size);