diff --git a/regrank/xgboost_regrank_obj.hpp b/regrank/xgboost_regrank_obj.hpp
index bcaa7f852..622cb1f5d 100644
--- a/regrank/xgboost_regrank_obj.hpp
+++ b/regrank/xgboost_regrank_obj.hpp
@@ -7,7 +7,6 @@
  */
 //#include "xgboost_regrank_sample.h"
 #include <vector>
-#include <tuple>
 #include <functional>
 #include "xgboost_regrank_sample.h"
 namespace xgboost{