Complete CacheReader.
diff --git a/lib/bcc/ScriptCached.cpp b/lib/bcc/ScriptCached.cpp
index 291bbc6..f43243d 100644
--- a/lib/bcc/ScriptCached.cpp
+++ b/lib/bcc/ScriptCached.cpp
@@ -24,6 +24,8 @@
 #include "ContextManager.h"
 #include "EmittedFuncInfo.h"
 
+#include <stdlib.h>
+
 namespace bcc {
 
 ScriptCached::~ScriptCached() {