diff --git a/aview/main.c b/aview/main.c

index 27cc3ef..83cda6d 100644

--- a/aview/main.c

+++ b/aview/main.c

@@ -2,6 +2,7 @@

 #include "image.h"

 #include "ui.h"

 #include "config.h"

+#include <stdlib.h>

 #define NAMELEN 256