diff --git a/media_gallery/media_gallery.fields.inc b/media_gallery/media_gallery.fields.inc
index 74a030c..975448d 100644
--- media_gallery/media_gallery.fields.inc
+++ media_gallery/media_gallery.fields.inc
@@ -224,10 +224,10 @@ function _media_gallery_get_media_title($file) {
   else {
     $replacements = array(
       '/\..*/' => '',                     // Remove first "." and everything after.
-      '/[^a-zA-Z0-9]+/' => ' ',           // Replace non letters or numbers with a single space.
-      '/([a-z])([A-Z])/' => '\1 \2',      // Insert a space between a lowercase letter and an uppercase letter.
-      '/([a-zA-Z])([0-9])/' => '\1 \2',   // Insert a space between a letter and a number.
-      '/([0-9])([a-zA-Z])/' => '\1 \2',   // Insert a space between a number and a letter.
+      '/([^\pL\pN])+/u' => ' ',           // Replace non letters or numbers with a single space.
+      '/(\pL])(\pLu)/u' => '\1 \2',       // Insert a space between a lowercase letter and an uppercase letter.
+      '/(\pL)(\pN)/u' => '\1 \2',         // Insert a space between a letter and a number.
+      '/(\pN)(\pL)/u' => '\1 \2',         // Insert a space between a number and a letter.
     );
     // In addition to above replacements, also capitalize the first letter of
     // each word, and remove leading and trailing spaces.