diff --git a/src/Misd/Linkify/Linkify.php b/src/Misd/Linkify/Linkify.php
index 0e3c9e6..9a574d2 100644
--- a/src/Misd/Linkify/Linkify.php
+++ b/src/Misd/Linkify/Linkify.php
@@ -164,7 +164,11 @@ protected function linkifyUrls($text, $options = array('attr' => ''))
             $pattern = "~^(ht|f)tps?://~";
 
             if (0 === preg_match($pattern, $match[0])) {
-                $match[0] = 'http://' . $match[0];
+                if (array_key_exists('require_scheme', $options) && $options['require_scheme']) {
+                    return $caption;
+                } else {
+                    $match[0] = 'http://' . $match[0];
+                }
             }
 
             if (isset($options['callback'])) {