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-rw-r--r--archive-tar.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/archive-tar.c b/archive-tar.c
index dc91c6b50d..0ba3f25cf5 100644
--- a/archive-tar.c
+++ b/archive-tar.c
@@ -139,13 +139,13 @@ static void strbuf_append_ext_header(struct strbuf *sb, const char *keyword,
static unsigned int ustar_header_chksum(const struct ustar_header *header)
{
- const char *p = (const char *)header;
+ const unsigned char *p = (const unsigned char *)header;
unsigned int chksum = 0;
- while (p < header->chksum)
+ while (p < (const unsigned char *)header->chksum)
chksum += *p++;
chksum += sizeof(header->chksum) * ' ';
p += sizeof(header->chksum);
- while (p < (const char *)header + sizeof(struct ustar_header))
+ while (p < (const unsigned char *)header + sizeof(struct ustar_header))
chksum += *p++;
return chksum;
}