diff --git a/app/js/tl/tl.js b/app/js/tl/tl.js
index e603cd1c..ef58c7b1 100644
--- a/app/js/tl/tl.js
+++ b/app/js/tl/tl.js
@@ -306,7 +306,7 @@ function moreload(type, tlid) {
 		var data=obj[tlid].data;
 	}
 	var sid = $("#timeline_" + tlid + " .cvo").last().attr("unique-id");
-	if (localStorage.getItem("morelock") != sid) {
+	if (sid && localStorage.getItem("morelock") != sid) {
 		localStorage.setItem("morelock", sid);
 		if (type == "mix" && localStorage.getItem("domain_" + acct_id)!="misskey.xyz") {
 			mixmore(tlid,"integrated");
@@ -555,4 +555,4 @@ function icon(type) {
 	}else if (type == "mix") {
 		return "share"
 	}
-}
\ No newline at end of file
+}