diff --git a/pkg/obiapat/obiapat.c b/pkg/obiapat/obiapat.c
index 8c25a18..028a711 100644
--- a/pkg/obiapat/obiapat.c
+++ b/pkg/obiapat/obiapat.c
@@ -1,6 +1,6 @@
 #include <string.h>
 #include <stdio.h>
-
+#include <stdlib.h>
 #include "libstki.h"
 #include "apat.h"