1 files changed, 3 insertions, 3 deletions
diff --git a/lib/dns.js b/lib/dns.js
index e92b180e9..8e6ed5c06 100644
--- a/lib/dns.js
+++ b/lib/dns.js
@@ -61,7 +61,7 @@ function errnoException(err, syscall) {
 //   callback.immediately = true;
 // }
 function makeAsync(callback) {
-  if (!IS_FUNCTION(callback)) {
+  if (!util.isFunction(callback)) {
     return callback;
   }
   return function asyncCallback() {
@@ -178,7 +178,7 @@ exports.reverse = resolveMap.PTR = resolver('getHostByAddr');
 
 exports.resolve = function(domain, type_, callback_) {
   var resolver, callback;
-  if (IS_STRING(type_)) {
+  if (util.isString(type_)) {
     resolver = resolveMap[type_];
     callback = callback_;
   } else {
@@ -186,7 +186,7 @@ exports.resolve = function(domain, type_, callback_) {
     callback = type_;
   }
 
-  if (IS_FUNCTION(resolver)) {
+  if (util.isFunction(resolver)) {
     return resolver(domain, callback);
   } else {
     throw new Error('Unknown type "' + type_ + '"');