diff --git a/lib/doh.c b/lib/doh.c
index 9660627ff69721fb18b4e029d15bd25e2e0bfc53..5d11aab3de7bddc1bb3ea585377cc2ec0c3fb4a7 100644
--- a/lib/doh.c
+++ b/lib/doh.c
@@ -526,7 +526,6 @@ static DOHcode store_cname(unsigned char *doh,
       index++;
 
     if(length) {
-      DOHcode rc;
       if(Curl_dyn_len(c)) {
         if(Curl_dyn_add(c, "."))
           return DOH_OUT_OF_MEM;