diff --git a/src/topics.js b/src/topics.js
index 7145cd9f68..a828047cfc 100644
--- a/src/topics.js
+++ b/src/topics.js
@@ -244,7 +244,10 @@ var async = require('async'),
 	};
 
 	Topics.getTopicWithPosts = function(tid, set, uid, start, end, reverse, callback) {
-
+		if (isNaN(start) || isNaN(end)) {
+			var e = new Error('TOO LARGE');
+			winston.warn('IS_NAN_CHECK set, start, end, uid, tid', set, start, end, uid, tid, e.stack);
+		}
 		Topics.getTopicData(tid, function(err, topicData) {
 			if (err || !topicData) {
 				return callback(err || new Error('[[error:no-topic]]'));