diff --git a/src/bundle/Resources/public/js/CKEditor/embed/image/embed-image-editing.js b/src/bundle/Resources/public/js/CKEditor/embed/image/embed-image-editing.js
index 9371fd7c..ee70c932 100644
--- a/src/bundle/Resources/public/js/CKEditor/embed/image/embed-image-editing.js
+++ b/src/bundle/Resources/public/js/CKEditor/embed/image/embed-image-editing.js
@@ -212,7 +212,10 @@ class IbexaEmbedImageEditing extends Plugin {
                     upcastWriter.setAttribute('ibexaLinkHref', link.getAttribute('href'), modelElement);
                     upcastWriter.setAttribute('ibexaLinkTitle', link.getAttribute('title') ?? '', modelElement);
                     upcastWriter.setAttribute('ibexaLinkTarget', link.getAttribute('target') ?? '', modelElement);
-                    upcastWriter.setAttribute('ibexaLinkClasses', link.getAttribute('class') ?? '', modelElement);
+
+                    if (link.getAttribute('class')) {
+                        upcastWriter.setAttribute('ibexaLinkClasses', link.getAttribute('class'), modelElement);
+                    }
                 }
 
                 return modelElement;