diff --git a/contrib/libarchive/libarchive/archive_hmac.c b/contrib/libarchive/libarchive/archive_hmac.c
index 012fe1596211..0914f38e3670 100644
--- a/contrib/libarchive/libarchive/archive_hmac.c
+++ b/contrib/libarchive/libarchive/archive_hmac.c
@@ -238,7 +238,7 @@ __hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
 	if (*ctx == NULL)
 		return -1;
 	EVP_MAC_free(mac);
-	params[0] = OSSL_PARAM_construct_utf8_string("digest", "SHA1", 0);
+	params[0] = OSSL_PARAM_construct_utf8_string("digest", (char *)"SHA1", 0);
 	params[1] = OSSL_PARAM_construct_end();
 	EVP_MAC_init(*ctx, key, key_len, params);
 #else
diff --git a/lib/libarchive/Makefile.inc b/lib/libarchive/Makefile.inc
index a03f87d7b6c3..3740beddc70f 100644
--- a/lib/libarchive/Makefile.inc
+++ b/lib/libarchive/Makefile.inc
@@ -12,6 +12,7 @@ CFLAGS+=	-DPLATFORM_CONFIG_H=\"${.CURDIR}/config_freebsd.h\"
 CFLAGS+=	-DWITH_OPENSSL
 CFLAGS+=	-DOPENSSL_API_COMPAT=0x10100000L
 LIBADD+=	crypto
+CFLAGS.archive_hmac.c+=-Wno-error=cast-qual
 .else
 LIBADD+=	md
 .endif