diff --git a/builder/vmware/iso/driver_esx5.go b/builder/vmware/iso/driver_esx5.go
index 90b7e11b4..80dc1878d 100644
--- a/builder/vmware/iso/driver_esx5.go
+++ b/builder/vmware/iso/driver_esx5.go
@@ -205,7 +205,7 @@ func (d *ESX5Driver) VNCAddress(_ string, portMin, portMax uint) (string, uint,
 		}
 		address := fmt.Sprintf("%s:%d", d.Host, port)
 		log.Printf("Trying address: %s...", address)
-		l, err := net.DialTimeout("tcp", address, 5*time.Second)
+		l, err := net.DialTimeout("tcp", address, 30*time.Second)
 
 		if err != nil {
 			if e, ok := err.(*net.OpError); ok {