diff --git a/src/Dibi/Helpers.php b/src/Dibi/Helpers.php
index e23d7491..308266a0 100644
--- a/src/Dibi/Helpers.php
+++ b/src/Dibi/Helpers.php
@@ -143,6 +143,7 @@ class Helpers
 	{
 		$best = null;
 		$min = (strlen($value) / 4 + 1) * 10 + .1;
+		$items = array_map('strval', $items);
 		foreach (array_unique($items) as $item) {
 			if (($len = levenshtein($item, $value, 10, 11, 10)) > 0 && $len < $min) {
 				$min = $len;