diff --git a/doc/82-Changelog.md b/doc/82-Changelog.md
index 84473e6e..08ba3ba8 100644
--- a/doc/82-Changelog.md
+++ b/doc/82-Changelog.md
@@ -12,6 +12,7 @@ before switching to a new version.
 
 ### User Interface
 * FIX: restoring a basket fails when there is only one configured DB (#1716)
+* FIX: creating a new Basket with a "Custom Selection" failed with an error (#1733)
 
 
 1.6.0
diff --git a/library/Director/DirectorObject/Automation/Basket.php b/library/Director/DirectorObject/Automation/Basket.php
index f1991327..d78e1640 100644
--- a/library/Director/DirectorObject/Automation/Basket.php
+++ b/library/Director/DirectorObject/Automation/Basket.php
@@ -145,7 +145,7 @@ class Basket extends DbObject implements ExportInterface
         } elseif ($objects === null || $objects === 'IGNORE') {
             return;
         } elseif ($objects === '[]' || is_array($objects)) {
-            if (! is_array($this->chosenObjects[$type])) {
+            if (! isset($this->chosenObjects[$type]) || ! is_array($this->chosenObjects[$type])) {
                 $this->chosenObjects[$type] = [];
             }
             if (isset($this->protectedFormerChosenObjects[$type])) {