diff --git a/src/http.c b/src/http.c
index 4b99c17..e020682 100644
--- a/src/http.c
+++ b/src/http.c
@@ -1875,6 +1875,8 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
                               xstrdup (number_to_static_string (body_data_size)),
                               rel_value);
         }
+      else if (strcasecmp (opt.method, "post") == 0)
+        request_set_header (req, "Content-Length", "0", rel_none);
     }
 
  retry_with_auth: