diff --git a/postinstall_runner_action.cc b/postinstall_runner_action.cc
index 86b7501..562ba16 100644
--- a/postinstall_runner_action.cc
+++ b/postinstall_runner_action.cc
@@ -4,8 +4,8 @@
 
 #include "update_engine/postinstall_runner_action.h"
 
-#include <sys/mount.h>
 #include <stdlib.h>
+#include <sys/mount.h>
 #include <vector>
 
 #include "update_engine/action_processor.h"