diff --git a/videojs/includes/videojs.theme.inc b/videojs/includes/videojs.theme.inc
index 3e9e3d2..9432daa 100644
--- a/videojs/includes/videojs.theme.inc
+++ b/videojs/includes/videojs.theme.inc
@@ -17,11 +17,11 @@ function template_preprocess_videojs(&$vars) {
       array('width' => '1920', 'height' => '1088', 'type' => "video/mp4; codecs='avc1.640029, mp4a.40.2'"), // Profile: High, Level: 4.1
       array('width' => '2048', 'height' => '2048', 'type' => "video/mp4; codecs='avc1.58A033, mp4a.40.2'") // Profile: Extended, Level: 5.1
     ),
-    'video/webm' => 'video/webm; codec="vp8, vorbis"',
-    'application/octet-stream' => 'video/webm; codec="vp8, vorbis"',
-    'video/ogg' => 'video/ogg; codec="theora, vorbis"',
-    'application/ogg' => 'video/ogg; codec="theora, vorbis"',
-    'video/quicktime' => 'video/mp4; codecs="avc1.42E01E, mp4a.40.2"'
+    'video/webm' => "video/webm; codecs='vp8, vorbis'",
+    'application/octet-stream' => "video/webm; codecs='vp8, vorbis'",
+    'video/ogg' => "video/ogg; codecs='theora, vorbis'",
+    'application/ogg' => "video/ogg; codecs='theora, vorbis'",
+    'video/quicktime' => "video/mp4; codecs='avc1.42E01E, mp4a.40.2'"
   );
   // set the width and height
   $vars['width'] = !empty($vars['attributes']['width']) ? $vars['attributes']['width'] : variable_get('videojs_width', 640);