fix compile warning

diff --git a/examples/ldns-testpkts.c b/examples/ldns-testpkts.c
index 53b19f7615bf62c120787ad0a546df7c632703ef..300e7e77a4c5d4536d5001ba036101cad7363fd2 100644 (file)
--- a/examples/ldns-testpkts.c
+++ b/examples/ldns-testpkts.c
@@ -694,7 +694,7 @@ match_all(ldns_pkt* q, ldns_pkt* p, bool mttl)
 
 /** Convert to hexstring and call verbose(), prepend with header */
 void
-verbose_hex(int lvl, uint8_t *data, size_t datalen, char *header)
+verbose_hex(int lvl, uint8_t *data, size_t datalen, const char *header)
 {
        size_t i;
        char errmsg[strlen(header) + datalen*3];