diff --git a/src/engine_mpi.cc b/src/engine_mpi.cc
index f61770802..7ff55b1e0 100644
--- a/src/engine_mpi.cc
+++ b/src/engine_mpi.cc
@@ -9,8 +9,8 @@
 #define _CRT_SECURE_NO_WARNINGS
 #define _CRT_SECURE_NO_DEPRECATE
 #define NOMINMAX
-#include <mpi.h>
 #include <cstdio>
+#include <mpi.h>
 #include "rabit/internal/engine.h"
 #include "rabit/internal/utils.h"