diff --git a/chrome/content/zotero/xpcom/feedReader.js b/chrome/content/zotero/xpcom/feedReader.js
index 1c01001b3e..6a9d1abc23 100644
--- a/chrome/content/zotero/xpcom/feedReader.js
+++ b/chrome/content/zotero/xpcom/feedReader.js
@@ -366,7 +366,7 @@ Zotero.FeedReader._getFeedItem = function (feedEntry, feedInfo) {
 	}
 	
 	let item = {
-		guid: feedEntry.id || feedEntry.link.spec
+		guid: feedEntry.id || feedEntry.link.href
 	};
 			
 	if (feedEntry.title) item.title = Zotero.FeedReader._getRichText(feedEntry.title, 'title');
@@ -386,7 +386,7 @@ Zotero.FeedReader._getFeedItem = function (feedEntry, feedInfo) {
 		}
 	}
 	
-	if (feedEntry.link) item.url = feedEntry.link.spec;
+	if (feedEntry.link) item.url = feedEntry.link.href;
 	
 	if (feedEntry.rights) item.rights = Zotero.FeedReader._getRichText(feedEntry.rights, 'rights');
 	
diff --git a/resource/feeds/FeedProcessor.js b/resource/feeds/FeedProcessor.js
index adbaccfd90..067333dab7 100644
--- a/resource/feeds/FeedProcessor.js
+++ b/resource/feeds/FeedProcessor.js
@@ -20,9 +20,9 @@ const RSS090NS = "http://my.netscape.com/rdf/simple/0.9/";
 
 /** *** Some general utils *****/
 function strToURI(link, base) {
-	base = base || null;
+	base = base || undefined;
 	try {
-		return Services.io.newURI(link, null, base);
+		return new URL(link, base);
 	}
 	catch (e) {
 		return null;
@@ -308,7 +308,7 @@ Feed.prototype = {
 		}
 		var url = this._resolveURI(this.image.url, base);
 		if (url) {
-			this.image.url = url.spec;
+			this.image.url = url.href;
 		}
 	},