dns: add missing const qualifier

1 files changed, 1 insertions, 1 deletions

diff --git a/dns.c b/dns.c
index d43e946..ed35dda 100644
--- a/dns.c
+++ b/dns.c
@@ -35,7 +35,7 @@ static unsigned short dns_res_ad_flag = 0;
 
 static int (*lookup)(res_state statep, const char *dname, int class, int type, unsigned char *answer, int anslen) = res_nquery;
 
-static int resolve(stralloc *domain, int type)
+static int resolve(const stralloc *domain, int type)
 {
  int n;
  int i;