--- a/dom/html/HTMLLinkElement.cpp
+++ b/dom/html/HTMLLinkElement.cpp
@@ -446,17 +446,17 @@ HTMLLinkElement::GetLinkTarget(nsAString
   if (aTarget.IsEmpty()) {
     GetBaseTarget(aTarget);
   }
 }
 
 static const DOMTokenListSupportedToken sSupportedRelValues[] = {
   // Keep this in sync with ToLinkMask in nsStyleLinkElement.cpp.
   // "import" must come first because it's conditional.
-  "import"
+  "import",
   "prefetch",
   "dns-prefetch",
   "stylesheet",
   "next",
   "alternate",
   "preconnect",
   "icon",
   "search",