diff --git a/src/rewards/index.js b/src/rewards/index.js
index c693b550fc..1b46b190d9 100644
--- a/src/rewards/index.js
+++ b/src/rewards/index.js
@@ -68,7 +68,7 @@ function getIDsByCondition(condition, callback) {
 }
 
 function filterCompletedRewards(uid, rewards, callback) {
-	db.getSortedSetRangeByScoreWithScores('uid:' + uid + ':rewards', 0, -1, 1, Infinity, function(err, data) {
+	db.getSortedSetRangeByScoreWithScores('uid:' + uid + ':rewards', 0, -1, 1, '+inf', function(err, data) {
 		if (err) {
 			return callback(err);
 		}