diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 181825a689e..244593e5b4a 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -971,6 +971,9 @@ function sanitizeVal($out = '', $check = 'alphanohtml', $filter = null, $options
 			}
 			break;
 		case 'intcomma':
+			if (is_array($out)) {
+				$out = implode(',', $out);
+			}
 			if (preg_match('/[^0-9,-]+/i', $out)) {
 				$out = '';
 			}