diff --git a/compiler/cpp/src/thriftl.ll b/compiler/cpp/src/thriftl.ll
index bdc41b1..00e9850 100644
--- a/compiler/cpp/src/thriftl.ll
+++ b/compiler/cpp/src/thriftl.ll
@@ -38,6 +38,7 @@
 
 #include <string>
 #include <errno.h>
+#include <stdlib.h>
 
 #include "main.h"
 #include "globals.h"