diff --git a/lib/dgram.js b/lib/dgram.js
index a919e16497486e..f005b8839da400 100644
--- a/lib/dgram.js
+++ b/lib/dgram.js
@@ -341,7 +341,7 @@ function afterSend(err) {
 
 
 Socket.prototype.close = function(callback) {
-  if (callback)
+  if (typeof callback === 'function')
     this.on('close', callback);
   this._healthCheck();
   this._stopReceiving();
diff --git a/test/parallel/test-dgram-close-is-not-callback.js b/test/parallel/test-dgram-close-is-not-callback.js
new file mode 100644
index 00000000000000..94035af97027bb
--- /dev/null
+++ b/test/parallel/test-dgram-close-is-not-callback.js
@@ -0,0 +1,21 @@
+var assert = require('assert');
+var common = require('../common');
+var dgram = require('dgram');
+
+var buf = new Buffer(1024);
+buf.fill(42);
+
+var socket = dgram.createSocket('udp4');
+var closeEvents = 0;
+socket.send(buf, 0, buf.length, common.PORT, 'localhost');
+
+// if close callback is not function, ignore the argument.
+socket.close('bad argument');
+
+socket.on('close', function() {
+  ++closeEvents;
+});
+
+process.on('exit', function() {
+  assert.equal(closeEvents, 1);
+});