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-rw-r--r--tools/firmware-utils/src/mkcsysimg.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/firmware-utils/src/mkcsysimg.c b/tools/firmware-utils/src/mkcsysimg.c
index 0e9392dde8..4f2352a60e 100644
--- a/tools/firmware-utils/src/mkcsysimg.c
+++ b/tools/firmware-utils/src/mkcsysimg.c
@@ -577,7 +577,7 @@ block_writeout_hdr(FILE *outfile, struct csys_block *block)
/* setup header fields */
memcpy(hdr.sig, block->sig, 4);
hdr.addr = HOST_TO_LE32(block->addr);
- hdr.size = HOST_TO_LE32(block->align-block->size_hdr);
+ hdr.size = HOST_TO_LE32(block->size - block->size_hdr - block->size_csum);
DBG(1,"writing header for block");
res = write_out_data(outfile, (uint8_t *)&hdr, sizeof(hdr),NULL);