diff --git a/internal/ceres/program_evaluator.h b/internal/ceres/program_evaluator.h
index e9640ab..a19cdf8 100644
--- a/internal/ceres/program_evaluator.h
+++ b/internal/ceres/program_evaluator.h
@@ -83,12 +83,14 @@
 #include <omp.h>
 #endif
 
+#include <map>
+#include <vector>
+#include "ceres/execution_summary.h"
+#include "ceres/internal/eigen.h"
+#include "ceres/internal/scoped_ptr.h"
 #include "ceres/parameter_block.h"
 #include "ceres/program.h"
 #include "ceres/residual_block.h"
-#include "ceres/internal/eigen.h"
-#include "ceres/internal/scoped_ptr.h"
-#include "ceres/execution_summary.h"
 
 namespace ceres {
 namespace internal {