1 files changed, 1 insertions, 1 deletions

diff --git a/archival/libarchive/get_header_tar.c b/archival/libarchive/get_header_tar.c
index 80a709144..b168653d8 100644
--- a/archival/libarchive/get_header_tar.c
+++ b/archival/libarchive/get_header_tar.c
@@ -84,7 +84,7 @@ static unsigned long long getOctal(char *str, int len)
                 first >>= 1; /* now 7th bit = 6th bit */
                 v = first;   /* sign-extend 8 bits to 64 */
                 while (--len != 0)
-                        v = (v << 8) + (unsigned char) *str++;
+                        v = (v << 8) + (uint8_t) *++str;
         }
         return v;
 }