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-rw-r--r--contrib/libarchive/libarchive/archive_hmac.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/contrib/libarchive/libarchive/archive_hmac.c b/contrib/libarchive/libarchive/archive_hmac.c
index 1e0ae283bc94..f29965577f01 100644
--- a/contrib/libarchive/libarchive/archive_hmac.c
+++ b/contrib/libarchive/libarchive/archive_hmac.c
@@ -76,6 +76,10 @@ __hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
#elif defined(_WIN32) && !defined(__CYGWIN__) && defined(HAVE_BCRYPT_H)
+#ifndef BCRYPT_HASH_REUSABLE_FLAG
+# define BCRYPT_HASH_REUSABLE_FLAG 0x00000020
+#endif
+
static int
__hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
{