diff --git a/htdocs/admin/oauth.php b/htdocs/admin/oauth.php
index a996a17ff0c..dea7e1e8d53 100644
--- a/htdocs/admin/oauth.php
+++ b/htdocs/admin/oauth.php
@@ -294,7 +294,7 @@ foreach ($list as $key) {
 }
 print '</select>';
 print ajax_combobox('provider');
-print ' <input type="text" name="label" value="" placeholder="'.$langs->trans("Label").'" pattern="^\S+$" title="'.$langs->trans("SpaceOrSpecialCharAreNotAllowed").'">';
+print ' <input type="text" name="label" value="" placeholder="'.$langs->trans("Label").'" pattern="^[a-zA-Z0-9]+$" title="'.$langs->trans("SpaceOrSpecialCharAreNotAllowed").'">';
 print ' <input type="submit" class="button small" name="add" value="'.$langs->trans("Add").'">';
 
 print '<br>';