diff --git a/js/view/messages.js b/js/view/messages.js
index ed7a835..0fa2848 100644
--- a/js/view/messages.js
+++ b/js/view/messages.js
@@ -132,7 +132,11 @@ function isScrolledToBottom() {
 	return scrolledTo >= el.scrollHeight;
 }
 function checkScrolledToBottom() {
-	byId("channel_contents_wrapper").className = isScrolledToBottom() ? "" : "not-at-bottom";
+	if (isScrolledToBottom()) {
+		removeClass(byId("channel_contents_wrapper"), "not-at-bottom");
+	} else {
+		addClass(byId("channel_contents_wrapper"), "not-at-bottom");
+	}
 }
 byId("channel_contents_wrapper").addEventListener("scroll", checkScrolledToBottom);