diff --git a/lib/private/preview/txt.php b/lib/private/preview/txt.php
index 77e728eb36..c9aa20968d 100644
--- a/lib/private/preview/txt.php
+++ b/lib/private/preview/txt.php
@@ -9,20 +9,19 @@ namespace OC\Preview;
 
 class TXT extends Provider {
 
-	private static $blacklist = array(
-		'text/calendar',
-		'text/vcard',
-	);
-
 	public function getMimeType() {
-		return '/text\/.*/';
+		return '/text\/plain/';
 	}
 
+	/**
+	 * @param string $path
+	 * @param int $maxX
+	 * @param int $maxY
+	 * @param boolean $scalingup
+	 * @param \OC\Files\View $fileview
+	 * @return bool|\OC_Image
+	 */
 	public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview) {
-		$mimetype = $fileview->getMimeType($path);
-		if(in_array($mimetype, self::$blacklist)) {
-			return false;
-		}
 
 		$content = $fileview->fopen($path, 'r');
 		$content = stream_get_contents($content);
@@ -62,22 +61,12 @@ class TXT extends Provider {
 
 \OC\Preview::registerProvider('OC\Preview\TXT');
 
-class PHP extends TXT {
+class MarkDown extends TXT {
 
 	public function getMimeType() {
-		return '/application\/x-php/';
+		return '/text\/(x-)?markdown/';
 	}
 
 }
 
-\OC\Preview::registerProvider('OC\Preview\PHP');
-
-class JavaScript extends TXT {
-
-	public function getMimeType() {
-		return '/application\/javascript/';
-	}
-
-}
-
-\OC\Preview::registerProvider('OC\Preview\JavaScript');
\ No newline at end of file
+\OC\Preview::registerProvider('OC\Preview\MarkDown');