diff --git a/common/cmd_usb.c b/common/cmd_usb.c
index 3227db9..c6b5d14 100644
--- a/common/cmd_usb.c
+++ b/common/cmd_usb.c
@@ -387,7 +387,7 @@
 
 	hdr = (image_header_t *)addr;
 
-	if (hdr->ih_magic != IH_MAGIC) {
+	if (ntohl(hdr->ih_magic) != IH_MAGIC) {
 		printf("\n** Bad Magic Number **\n");
 		return 1;
 	}
@@ -402,7 +402,7 @@
 
 	print_image_hdr (hdr);
 
-	cnt = (hdr->ih_size + sizeof(image_header_t));
+	cnt = (ntohl(hdr->ih_size) + sizeof(image_header_t));
 	cnt += info.blksz - 1;
 	cnt /= info.blksz;
 	cnt -= 1;