http: fix invalid unsigned arithmetic

1 files changed, 1 insertions, 1 deletions

diff --git a/http.c b/http.c
index 563d211a..9dcb1696 100644
--- a/http.c
+++ b/http.c
@@ -565,7 +565,7 @@ evhttp_maybe_add_date_header(struct evkeyvalq *headers)
 {
 	if (evhttp_find_header(headers, "Date") == NULL) {
 		char date[50];
-		if (sizeof(date) - evutil_date_rfc1123(date, sizeof(date), NULL) > 0) {
+		if ((signed)sizeof(date) > evutil_date_rfc1123(date, sizeof(date), NULL)) {
 			evhttp_add_header(headers, "Date", date);
 		}
 	}