diff --git a/include/image.h b/include/image.h
index f54d983..3a472c9 100644
--- a/include/image.h
+++ b/include/image.h
@@ -179,6 +179,9 @@
 #define IH_MAGIC	0x27051956	/* Image Magic Number		*/
 #define IH_NMLEN		32	/* Image Name Length		*/
 
+/* Reused from common.h */
+#define ROUND(a, b)		(((a) + (b) - 1) & ~((b) - 1))
+
 /*
  * Legacy format image header,
  * all data in network byte order (aka natural aka bigendian).
diff --git a/tools/imximage.c b/tools/imximage.c
index 63f88b6..a93d7eb 100644
--- a/tools/imximage.c
+++ b/tools/imximage.c
@@ -515,7 +515,14 @@ static void imximage_set_header(void *ptr, struct stat *sbuf, int ifd,
 
 	/* Set the imx header */
 	(*set_imx_hdr)(imxhdr, dcd_len, params->ep, imxhdr->flash_offset);
-	*header_size_ptr = sbuf->st_size + imxhdr->flash_offset;
+
+	/*
+	 * ROM bug alert
+	 * mx53 only loads 512 byte multiples.
+	 * The remaining fraction of a block bytes would
+	 * not be loaded.
+	 */
+	*header_size_ptr = ROUND(sbuf->st_size + imxhdr->flash_offset, 512);
 }
 
 int imximage_check_params(struct mkimage_params *params)