Make max align size a #define
diff --git a/boot/bootutil/src/bootutil_priv.h b/boot/bootutil/src/bootutil_priv.h
index 79885ae..3bdd1cc 100644
--- a/boot/bootutil/src/bootutil_priv.h
+++ b/boot/bootutil/src/bootutil_priv.h
@@ -39,6 +39,8 @@
 
 #define BOOT_TMPBUF_SZ  256
 
+#define BOOT_MAX_ALIGN  8
+
 /*
  * Maintain state of copy progress.
  */