diff --git a/aos/util/log_interval.h b/aos/util/log_interval.h
index b6410a9..d346852 100644
--- a/aos/util/log_interval.h
+++ b/aos/util/log_interval.h
@@ -1,11 +1,11 @@
 #ifndef AOS_UTIL_LOG_INTERVAL_H_
 #define AOS_UTIL_LOG_INTERVAL_H_
 
+#include <string>
+
 #include "aos/logging/logging.h"
 #include "aos/time/time.h"
 
-#include <string>
-
 namespace aos {
 namespace util {