https://github.com/termux/termux-packages/issues/15852

--- a/src/aalib.c
+++ b/src/aalib.c
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <malloc.h>
 #include "aalib.h"