diff --git a/common/placer1.cc b/common/placer1.cc
index ba8bec3b..cec37847 100644
--- a/common/placer1.cc
+++ b/common/placer1.cc
@@ -24,6 +24,7 @@
 #include "placer1.h"
 #include <algorithm>
 #include <boost/lexical_cast.hpp>
+#include <chrono>
 #include <cmath>
 #include <iostream>
 #include <limits>
@@ -37,7 +38,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <vector>
-#include <chrono>
 #include "log.h"
 #include "place_common.h"
 #include "timing.h"
diff --git a/common/router1.cc b/common/router1.cc
index 0dbbfb17..28a422c8 100644
--- a/common/router1.cc
+++ b/common/router1.cc
@@ -17,9 +17,9 @@
  *
  */
 
+#include <chrono>
 #include <cmath>
 #include <queue>
-#include <chrono>
 
 #include "log.h"
 #include "router1.h"