diff --git a/formwidgets/responsiveimage/assets/src/popup.mixin.js b/formwidgets/responsiveimage/assets/src/popup.mixin.js
index c30cb0d..4470f49 100644
--- a/formwidgets/responsiveimage/assets/src/popup.mixin.js
+++ b/formwidgets/responsiveimage/assets/src/popup.mixin.js
@@ -52,6 +52,12 @@ export default {
                         $.oc.flashMsg({ text: 'Bitte einen Titel angeben.', class: 'error' });
                         return;
                     }
+
+                    if (_cls.aspectRatio && !_cls.popup.values.crop) {
+                        $.oc.flashMsg({ text: 'Bitte das Bild beschneiden', class: 'error' });
+                        return;
+                    }
+
                     $popup.modal('hide');
 
                     resolve(_cls.popup.values);