Added const everywhere.

1 files changed, 1 insertions, 1 deletions

diff --git a/xs_curl.h b/xs_curl.h
index f7783b9..2628d91 100644
--- a/xs_curl.h
+++ b/xs_curl.h
@@ -28,7 +28,7 @@ static size_t _header_callback(char *buffer, size_t size,
     if (xs_str_in(l, ": ") != -1) {
         xs *knv = xs_split_n(l, ": ", 1);
 
-        xs_tolower_i(xs_list_get(knv, 0));
+        xs_tolower_i((xs_str *)xs_list_get(knv, 0));
 
         headers = xs_dict_set(headers, xs_list_get(knv, 0), xs_list_get(knv, 1));
     }