diff --git a/demo/rank/mq2008.conf b/demo/rank/mq2008.conf
index 08b9d9679..0853fcb4e 100644
--- a/demo/rank/mq2008.conf
+++ b/demo/rank/mq2008.conf
@@ -4,8 +4,8 @@ booster_type = 0
 
 objective="rank:pairwise"
 #objective="rank:softmax"
-#objective="lambdarank:map"
-#objective="lambdarank:ndcg"
+#objective="rank:map"
+#objective="rank:ndcg"
 
 # Tree Booster Parameters
 # step size shrinkage
diff --git a/regrank/xgboost_regrank_obj.h b/regrank/xgboost_regrank_obj.h
index f2fee0653..5a7bad9dd 100644
--- a/regrank/xgboost_regrank_obj.h
+++ b/regrank/xgboost_regrank_obj.h
@@ -113,8 +113,8 @@ namespace xgboost{
             if( !strcmp("rank:pairwise", name ) ) return new PairwiseRankObj();
             if( !strcmp("rank:softmax", name ) ) return new SoftmaxRankObj();
             if( !strcmp("softmax", name ) ) return new SoftmaxMultiClassObj();
-            //            if (!strcmp("lambdarank:map", name)) return new LambdaRankObj_MAP();
-            //            if (!strcmp("lambdarank:ndcg", name)) return new LambdaRankObj_NDCG();
+            if (!strcmp("rank:map", name)) return new LambdaRankObj_MAP();
+            if (!strcmp("rank:ndcg", name)) return new LambdaRankObj_NDCG();
             utils::Error("unknown objective function type");
             return NULL;
         }