diff --git a/aos/mutex/mutex.cc b/aos/mutex/mutex.cc
index 18d233d..5c5dcbe 100644
--- a/aos/mutex/mutex.cc
+++ b/aos/mutex/mutex.cc
@@ -4,9 +4,10 @@
 #include <cstdio>
 #include <cstring>
 
-#include "aos/type_traits/type_traits.h"
 #include "glog/logging.h"
 
+#include "aos/type_traits/type_traits.h"
+
 namespace aos {
 
 // Lock and Unlock use the return values of mutex_lock/mutex_unlock