1 files changed, 7 insertions, 0 deletions
diff --git a/tt-rss.js b/tt-rss.js
index 26218889e..a760c4c12 100644
--- a/tt-rss.js
+++ b/tt-rss.js
@@ -276,6 +276,13 @@ function viewfeed(feed, skip, subop) {
 	
 	disableContainerChildren("headlinesToolbar", false, doc);
 
+	var btnMarkAsRead = document.getElementById("btnMarkFeedAsRead");
+
+	if (btnMarkAsRead && (feed < 0 || !isNumeric(feed))) {
+		btnMarkAsRead.disabled = true;
+		btnMarkAsRead.className = "disabledButton";
+	}
+
 //	notify("");
 
 }