diff --git a/boot/nxboot/loader/boot.c b/boot/nxboot/loader/boot.c
index 9364ba16f94..42f83a66e2e 100644
--- a/boot/nxboot/loader/boot.c
+++ b/boot/nxboot/loader/boot.c
@@ -164,7 +164,7 @@ static int copy_partition(int from, int where, struct nxboot_state *state,
 #ifdef CONFIG_NXBOOT_PRINTF_PROGRESS_PERCENT
   total_size = remain * 100;
 #endif
-  blocksize = MAX(info_from.blocksize, info_where.blocksize);
+  blocksize = info_where.blocksize;
 
   buf = malloc(blocksize);
   if (!buf)
diff --git a/boot/nxboot/loader/flash.c b/boot/nxboot/loader/flash.c
index fdbab4bb99d..9142b25d9f0 100644
--- a/boot/nxboot/loader/flash.c
+++ b/boot/nxboot/loader/flash.c
@@ -64,7 +64,7 @@ int flash_partition_open(const char *path)
 {
   int fd;
 
-  fd = open(path, O_RDWR);
+  fd = open(path, O_RDWR | O_DIRECT);
   if (fd < 0)
     {
       syslog(LOG_ERR, "Could not open %s partition: %s\n",