diff --git a/src/lib/cryptafinity_global.hh b/src/lib/cryptafinity_global.hh
index 9d63ca5..359a2ac 100644
--- a/src/lib/cryptafinity_global.hh
+++ b/src/lib/cryptafinity_global.hh
@@ -1,6 +1,7 @@
 #ifndef _CRYPTAFINITY_GLOBAL_HH
 #define _CRYPTAFINITY_GLOBAL_HH
 
+#include <stdlib.h>
 #include <stdio.h>
 #include <list>
 #include <vector>