--- a/BZip2Stream.st	Fri Jun 17 11:20:48 2016 +0100
+++ b/BZip2Stream.st	Fri Jun 17 11:24:07 2016 +0100
@@ -28,6 +28,7 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 
 #ifdef WIN32
 // sigh - bzlib.h includes windows.h, which does not like ST/X definitions