diff --git a/htdocs/blockedlog/ajax/block-info.php b/htdocs/blockedlog/ajax/block-info.php
index 8d8d0ecde5d..707353715c5 100644
--- a/htdocs/blockedlog/ajax/block-info.php
+++ b/htdocs/blockedlog/ajax/block-info.php
@@ -197,8 +197,8 @@ function formatObject($objtoshow, $prefix)
 				if (empty($label) && !empty($otherlabels[$key])) {
 					$label = $langs->trans($otherlabels[$key]);
 				}
-				if (empty($label) && array_key_exists($key, $convertkey) && array_key_exists($convertkey[$key], $otherlabels)) {
-					$label = $langs->trans($otherlabels[$convertkey[$key]]);
+				if (empty($label) && array_key_exists($key, $convertkey) && array_key_exists((string) $convertkey[$key], $otherlabels)) {
+					$label = $langs->trans($otherlabels[(string) $convertkey[$key]]);
 				}
 				if (empty($label)) {
 					$label = array_key_exists($key, $convertkey) ? $convertkey[$key] : '';