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-rw-r--r--toys/posix/tar.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/toys/posix/tar.c b/toys/posix/tar.c
index ff129819..1e662589 100644
--- a/toys/posix/tar.c
+++ b/toys/posix/tar.c
@@ -848,7 +848,7 @@ void tar_main(void)
// detect gzip and bzip signatures
if (SWAP_BE16(*(short *)hdr)==0x1f8b) toys.optflags |= FLAG_z;
else if (!memcmp(hdr, "BZh", 3)) toys.optflags |= FLAG_j;
- else if (peek_be(hdr, 7) == 0xfd377a585a0000) toys.optflags |= FLAG_J;
+ else if (peek_be(hdr, 7) == 0xfd377a585a0000UL) toys.optflags |= FLAG_J;
else error_exit("Not tar");
// if we can seek back we don't need to loop and copy data