diff --git a/regression/xgboost_reg.h b/regression/xgboost_reg.h
index ff7bc10c0..db1395168 100644
--- a/regression/xgboost_reg.h
+++ b/regression/xgboost_reg.h
@@ -9,8 +9,8 @@
 #include <cstdlib>
 #include <cstring>
 #include <omp.h>
-#include "xgboost_regdata.h"
-#include "xgboost_regeval.h"
+#include "xgboost_reg_data.h"
+#include "xgboost_reg_eval.h"
 #include "../booster/xgboost_gbmbase.h"
 #include "../utils/xgboost_utils.h"
 #include "../utils/xgboost_stream.h"
diff --git a/regression/xgboost_reg_data.h b/regression/xgboost_reg_data.h
index b2511c303..317c7603a 100644
--- a/regression/xgboost_reg_data.h
+++ b/regression/xgboost_reg_data.h
@@ -1,15 +1,15 @@
-#ifndef XGBOOST_REGDATA_H
-#define XGBOOST_REGDATA_H
+#ifndef XGBOOST_REG_DATA_H
+#define XGBOOST_REG_DATA_H
 
 /*!
-* \file xgboost_regdata.h
-* \brief input data structure for regression and binary classification task.
-*     Format:
-*        The data should contain each data instance in each line.
-*		  The format of line data is as below:
-*        label <nonzero feature dimension> [feature index:feature value]+
-* \author Kailong Chen: chenkl198812@gmail.com, Tianqi Chen: tianqi.tchen@gmail.com
-*/
+ * \file xgboost_reg_data.h
+ * \brief input data structure for regression and binary classification task.
+ *     Format:
+ *        The data should contain each data instance in each line.
+ *		  The format of line data is as below:
+ *        label <nonzero feature dimension> [feature index:feature value]+
+ * \author Kailong Chen: chenkl198812@gmail.com, Tianqi Chen: tianqi.tchen@gmail.com
+ */
 #include <cstdio>
 #include <vector>
 #include "../booster/xgboost_data.h"
diff --git a/regression/xgboost_reg_eval.h b/regression/xgboost_reg_eval.h
index b78d2c35d..5cd40eb83 100644
--- a/regression/xgboost_reg_eval.h
+++ b/regression/xgboost_reg_eval.h
@@ -1,7 +1,7 @@
-#ifndef XGBOOST_REGEVAL_H
-#define XGBOOST_REGEVAL_H
+#ifndef XGBOOST_REG_EVAL_H
+#define XGBOOST_REG_EVAL_H
 /*!
-* \file xgboost_regeval.h
+* \file xgboost_reg_eval.h
 * \brief evaluation metrics for regression and classification
 * \author Kailong Chen: chenkl198812@gmail.com, Tianqi Chen: tianqi.tchen@gmail.com
 */