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-rw-r--r--c_src/cmd_image.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/c_src/cmd_image.c b/c_src/cmd_image.c
index 58268b4b..0d947da9 100644
--- a/c_src/cmd_image.c
+++ b/c_src/cmd_image.c
@@ -635,7 +635,7 @@ static int image_update(const char *src_path, const char *dst_image,
u64 input_bytes = count_input_size(src_fd);
- if (truncate(dst_image, input_bytes * 2))
+ if (truncate(dst_image, xstat(dst_image).st_size + input_bytes * 2))
die("truncate error: %m");
darray_const_str device_paths = {};