diff --git a/compiler2/EnumItem.cc b/compiler2/EnumItem.cc
index c3ed3e7d49ea1a03c0a76c7ae1e3fb8f6683912a..858c11dbed5690418bf014e376cef03f89fb1bae 100644
--- a/compiler2/EnumItem.cc
+++ b/compiler2/EnumItem.cc
@@ -15,6 +15,7 @@
 #include "EnumItem.hh"
 #include "Value.hh"
 #include "Int.hh"
+#include <stdlib.h>
 
 namespace Common {