diff --git a/code/editor/EditableCheckboxGroupField.php b/code/editor/EditableCheckboxGroupField.php
index 1ed2704..d1853dd 100755
--- a/code/editor/EditableCheckboxGroupField.php
+++ b/code/editor/EditableCheckboxGroupField.php
@@ -65,7 +65,7 @@ class EditableCheckboxGroupField extends EditableFormField {
 				continue;
 			}
 			
-			if($data[$option->ID]) {
+			if(isset($data[$option->ID])) {
 				$option->populateFromPostData( $data[$option->ID] );
 			}