diff --git a/util/thread_local.cc b/util/thread_local.cc
index 0b6857fff..60e418dff 100644
--- a/util/thread_local.cc
+++ b/util/thread_local.cc
@@ -10,7 +10,7 @@
 #include "util/thread_local.h"
 #include "util/mutexlock.h"
 #include "port/likely.h"
-
+#include <stdlib.h>
 
 namespace rocksdb {