diff --git a/src/static/js/skin_variants.js b/src/static/js/skin_variants.js
index 070a114b4..8fc056acf 100644
--- a/src/static/js/skin_variants.js
+++ b/src/static/js/skin_variants.js
@@ -35,7 +35,7 @@ if (window.location.hash.toLowerCase() == "#skinvariantsbuilder") {
 
     domsToUpdate.forEach(function(el) { el.addClass(new_classes.join(" ")); });
 
-    $('#skin-variants-result').val('"skinVariants": "' + new_classes.join(" ") + '"');
+    $('#skin-variants-result').val('"skinVariants": "' + new_classes.join(" ") + '",');
   }
 
   // run on init
@@ -52,4 +52,4 @@ if (window.location.hash.toLowerCase() == "#skinvariantsbuilder") {
 
     $('#skin-variant-full-width').prop('checked', $('html').hasClass('full-width-editor'));
   }
-}
\ No newline at end of file
+}