diff --git a/src/tls_wrap.cc b/src/tls_wrap.cc
index 05349b2f55230d..6745c784239f33 100644
--- a/src/tls_wrap.cc
+++ b/src/tls_wrap.cc
@@ -933,6 +933,7 @@ void TLSWrap::Initialize(Local<Object> target,
   env->SetMethod(target, "wrap", TLSWrap::Wrap);
 
   auto constructor = [](const FunctionCallbackInfo<Value>& args) {
+    CHECK(args.IsConstructCall());
     args.This()->SetAlignedPointerInInternalField(0, nullptr);
   };
   auto t = env->NewFunctionTemplate(constructor);