diff --git a/pandora_console/operation/reporting/graph_viewer.php b/pandora_console/operation/reporting/graph_viewer.php
index e28442dcc6..61a0b672cc 100644
--- a/pandora_console/operation/reporting/graph_viewer.php
+++ b/pandora_console/operation/reporting/graph_viewer.php
@@ -344,7 +344,7 @@ if ($view_graph) {
     $searchForm .= "<td class='datos w30p'>";
     $searchForm .= html_print_label_input_block(
         __('Time range'),
-        html_print_extended_select_for_time('period', $period, '', '', '0', 10, true, 'width:100%')
+        html_print_extended_select_for_time('period', (string) $period, '', '', 0, 10, true, 'width:100%')
     );
     $searchForm .= '</td>';
     $searchForm .= '</tr><tr>';
@@ -376,9 +376,9 @@ if ($view_graph) {
             false,
             '',
             false
-        )
+        ),
+        ['div_id' => 'thresholdDiv']
     );
-    $searchForm .= '</div>';
     $searchForm .= '</td>';
 
     $searchForm .= "<td class='datos w30p'>";