diff --git a/lib/fetch/http.c b/lib/fetch/http.c
index 4073cd011..faa3a6239 100644
--- a/lib/fetch/http.c
+++ b/lib/fetch/http.c
@@ -1315,6 +1315,7 @@ http_digest_auth(conn_t *conn, const char *hdr, http_auth_challenge_t *c,
 {
 	HASHHEX HA1;
 	HASHHEX digest;
+	HASHHEX empty = {0};
 	int r;
 	char noncecount[10];
 	char cnonce[40];
@@ -1347,7 +1348,7 @@ http_digest_auth(conn_t *conn, const char *hdr, http_auth_challenge_t *c,
 		      parms->password, c->nonce, cnonce, HA1);
 	DEBUGF("HA1: [%s]\n", HA1);
 	DigestCalcResponse(HA1, c->nonce, noncecount, cnonce, c->qop,
-			   "GET", url->doc, "", digest);
+			   "GET", url->doc, empty, digest);
 
 	if (c->qop[0]) {
 		r = http_cmd(conn, "%s: Digest username=\"%s\",realm=\"%s\","