diff --git a/core/js/js.js b/core/js/js.js
index 8c6fc0d9c07cdf6f520f36d4c395e95381f2673a..370e68f560242559219e70522bec279e63c269f6 100644
--- a/core/js/js.js
+++ b/core/js/js.js
@@ -1351,7 +1351,7 @@ function initCore() {
 		var url = OC.generateUrl('/heartbeat');
 		var heartBeatTimeout = null;
 		var heartBeat = function() {
-			clearTimeout(heartBeatTimeout);
+			clearInterval(heartBeatTimeout);
 			heartBeatTimeout = setInterval(function() {
 				$.post(url);
 			}, interval * 1000);