diff --git a/index.php b/index.php
index d2fd60f..c4f6991 100755
--- a/index.php
+++ b/index.php
@@ -903,7 +903,7 @@ function xmlhttpGet(strURL, strQueryString) {
 					}
 					$display_infos .= implode(' + ', $ainfos) . ' audio';
 				}
-				$ext = substr($v, strrpos($v, '.')+1);
+				$ext = strtolower(substr($v, strrpos($v, '.')+1));
 				if (is_dir($real_file)) {
 					$display_infos .= ', VIDEO_TS (DVD) container';
 				}