diff --git a/src/IDF/Form/Admin/ProjectCreate.php b/src/IDF/Form/Admin/ProjectCreate.php
index 8afd8b6..3521a7f 100644
--- a/src/IDF/Form/Admin/ProjectCreate.php
+++ b/src/IDF/Form/Admin/ProjectCreate.php
@@ -126,9 +126,15 @@ class IDF_Form_Admin_ProjectCreate extends Pluf_Form
     public function clean_shortname()
     {
         $shortname = $this->cleaned_data['shortname'];
-        if (preg_match('/[^A-Za-z0-9]/', $shortname)) {
+        if (preg_match('/[^\-A-Za-z0-9]/', $shortname)) {
             throw new Pluf_Form_Invalid(__('This shortname contains illegal characters, please use only letters and digits.'));
         }
+        if (mb_substr($shortname, 0, 1) == '-') {
+            throw new Pluf_Form_Invalid(__('The shortname cannot start with the dash (-) character.'));
+        }
+        if (mb_substr($shortname, -1) == '-') {
+            throw new Pluf_Form_Invalid(__('The shortname cannot end with the dash (-) character.'));
+        }
         $sql = new Pluf_SQL('shortname=%s', array($shortname));
         $l = Pluf::factory('IDF_Project')->getList(array('filter'=>$sql->gen()));
         if ($l->count() > 0) {