diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5ac9ab572..81f8210e5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@
     * Fixed markdown media operations not working when using `image://` stream [#3333](https://github.com/getgrav/grav/issues/3333) [#3349](https://github.com/getgrav/grav/issues/3349)
     * Fixed copying page without changing the slug [getgrav/grav-plugin-admin#2135](https://github.com/getgrav/grav-plugin-admin/issues/2139)
     * Fixed missing and commonly used methods when using `system.twig.undefined_functions = false` [getgrav/grav-plugin-admin#2138](https://github.com/getgrav/grav-plugin-admin/issues/2138)
+    * Fixed uploading images into Flex Object if field destination is not set
 
 # v1.7.14
 ## 04/29/2021
diff --git a/system/src/Grav/Framework/Flex/Traits/FlexMediaTrait.php b/system/src/Grav/Framework/Flex/Traits/FlexMediaTrait.php
index 519861e95..197664a4f 100644
--- a/system/src/Grav/Framework/Flex/Traits/FlexMediaTrait.php
+++ b/system/src/Grav/Framework/Flex/Traits/FlexMediaTrait.php
@@ -373,7 +373,7 @@ trait FlexMediaTrait
             if (is_array($upload)) {
                 // Uses new format with [UploadedFileInterface, array].
                 $settings = $upload[1];
-                if ($settings['destination'] === $media->getPath()) {
+                if (isset($settings['destination']) && $settings['destination'] === $media->getPath()) {
                     $upload = $upload[0];
                 } else {
                     $upload = false;