diff --git a/includes/functions.php b/includes/functions.php
index e8a8441f90..dce9efb9cb 100755
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -115,7 +115,7 @@ function getHostOS($device) {
     $sysDescr = str_replace("\"", "", trim(shell_exec($sysDescr_cmd)));
     $dir_handle = @opendir($config['install_dir'] . "/includes/osdiscovery") or die("Unable to open $path");
     while ($file = readdir($dir_handle)) {
-      if( preg_match("/^discover-([a-z0-9]*).php/", $file) ) {
+      if( preg_match("/^discover-([a-z0-9\-]*).php/", $file) ) {
         include($config['install_dir'] . "/includes/osdiscovery/" . $file);
       }
     }