diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 8d6c325b903125b9820d497e3b850d9688ac521e..ee1b7e615958f3905332a5199fc2af183f7b000f 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,7 +1,9 @@
 
 Title 7.x-1.x, xxxx-xx-xx
 -------------------------
-Issue #1269076 by plach, das-peter, danielnolde | renat: Fixed Translated
+#1850866 by B-Prod: Fixed Undefined index 'format' in
+  title_field_text_with_summary_sync_set().
+#1269076 by plach, das-peter, danielnolde | renat: Fixed Translated
   title_field replaces node->title with translated value.
 
 
diff --git a/title.core.inc b/title.core.inc
index 95c9daf7cea2ea5d79575a1ed0978a907399a8ad..2af63f90430b0f84b23bec07dc561e96cbe7876d 100644
--- a/title.core.inc
+++ b/title.core.inc
@@ -162,9 +162,11 @@ function title_field_text_with_summary_sync_get($entity_type, $entity, $legacy_f
  * Sync back callback for the text with summary field type.
  */
 function title_field_text_with_summary_sync_set($entity_type, $entity, $legacy_field, $info, $langcode) {
-  $format_key = $info['additional keys']['format'];
-  $entity->{$info['field']['field_name']}[$langcode][0]['value'] = $entity->{$legacy_field};
-  $entity->{$info['field']['field_name']}[$langcode][0]['format'] = $entity->{$format_key};
+  foreach (array('value' => $legacy_field, 'format' => $info['additional keys']['format']) as $column => $name) {
+    if (isset($entity->{$name})) {
+      $entity->{$info['field']['field_name']}[$langcode][0][$column] = $entity->{$name};
+    }
+  }
 }
 
 /**