diff --git a/src/Form/JobItemForm.php b/src/Form/JobItemForm.php
index fa94d08..af620ba 100644
--- a/src/Form/JobItemForm.php
+++ b/src/Form/JobItemForm.php
@@ -490,6 +490,12 @@ class JobItemForm extends TmgmtFormBase {
    */
   function compareHTMLTags($source, $translation) {
     $pattern = "/\<(.*?)\>/";
+    if (is_array($source)) {
+      $source = $source['value'];
+    }
+    if (is_array($translation)) {
+      $translation = $translation['value'];
+    }
     preg_match_all($pattern, $source, $source_tags);
     preg_match_all($pattern, $translation, $translation_tags);
     $message = '';