diff --git a/src/cares_wrap.cc b/src/cares_wrap.cc
index eb7d1079f67..db2fb75438e 100644
--- a/src/cares_wrap.cc
+++ b/src/cares_wrap.cc
@@ -2251,13 +2251,13 @@ void SetServers(const FunctionCallbackInfo<Value>& args) {
     if (!elm->Get(env->context(), 1).ToLocal(&ipValue)) return;
     if (!elm->Get(env->context(), 2).ToLocal(&portValue)) return;
 
-    CHECK(familyValue->Int32Value(env->context()).FromJust());
+    CHECK(familyValue->IsInt32());
     CHECK(ipValue->IsString());
-    CHECK(portValue->Int32Value(env->context()).FromJust());
+    CHECK(portValue->IsInt32());
 
-    int fam = familyValue->Int32Value(env->context()).FromJust();
+    int32_t fam = familyValue.As<Int32>()->Value();
     node::Utf8Value ip(env->isolate(), ipValue);
-    int port = portValue->Int32Value(env->context()).FromJust();
+    int32_t port = portValue.As<Int32>()->Value();
 
     if (!csv.empty()) csv += ',';
 
diff --git a/test/parallel/test-dns.js b/test/parallel/test-dns.js
index e885a700752..2ac763ffa2d 100644
--- a/test/parallel/test-dns.js
+++ b/test/parallel/test-dns.js
@@ -134,6 +134,10 @@ const portsExpected = [
 dns.setServers(ports);
 assert.deepStrictEqual(dns.getServers(), portsExpected);
 
+// Port 0 means "use the default port" for c-ares.
+dns.setServers(['4.4.4.4:0', '[2001:4860:4860::8888]:0']);
+assert.deepStrictEqual(dns.getServers(), ['4.4.4.4', '2001:4860:4860::8888']);
+
 // Link-local IPv6 addresses require a zone index (scope id) to be usable;
 // c-ares drops link-local servers configured without one.
 dns.setServers(['[fe80::483a:5aff:fee6:1f04]%eth0']);