diff --git a/src/export.cpp b/src/export.cpp
index 3e49724ee..0c1250b67 100644
--- a/src/export.cpp
+++ b/src/export.cpp
@@ -27,6 +27,7 @@
 
 #include <iostream>
 #include <sstream>
+#include <stdlib.h>
 
 #include "Att.h"
 #include "text.h"