diff --git a/demo/rank/mq2008.conf b/demo/rank/mq2008.conf
index f355b0578..65ad19b8e 100644
--- a/demo/rank/mq2008.conf
+++ b/demo/rank/mq2008.conf
@@ -3,7 +3,7 @@
 booster_type = 0 
 
 # specify objective
-objective="rank:map"
+objective="rank:pairwise"
 
 # Tree Booster Parameters
 # step size shrinkage