diff --git a/wp-includes/js/tinymce/skins/wordpress/wp-content.css b/wp-includes/js/tinymce/skins/wordpress/wp-content.css
index d252d1e524..8fceb8ef63 100644
--- a/wp-includes/js/tinymce/skins/wordpress/wp-content.css
+++ b/wp-includes/js/tinymce/skins/wordpress/wp-content.css
@@ -206,6 +206,10 @@ audio {
 	border: 0;
 	width: 1px;
 	height: 1px;
+	-moz-user-select: text;
+	-webkit-user-select: text;
+	-ms-user-select: text;
+	user-select: text;
 }
 
 /**