diff --git a/plugins/widget/plugin.js b/plugins/widget/plugin.js
index de81d66406a..1ae9b3e650e 100644
--- a/plugins/widget/plugin.js
+++ b/plugins/widget/plugin.js
@@ -3426,6 +3426,11 @@
 			if ( focused ) {
 				editor.widgets.del( focused );
 			} else {
+				// We have to add fillers manually for Safari (#3537).
+				if ( CKEDITOR.env.webkit && !CKEDITOR.env.chrome ) {
+					CKEDITOR.plugins.widgetselection.addFillers( editor.editable() );
+				}
+
 				editor.extractSelectedHtml();
 			}