diff --git a/lib/if2ip.c b/lib/if2ip.c
index 99fa011060e529285ba9115a693fd366b3a5b426..43584c75cd82a44b1c9683a53ecf1f718fde1ad3 100644
--- a/lib/if2ip.c
+++ b/lib/if2ip.c
@@ -202,6 +202,7 @@ if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
                           const char *interf, char *buf, int buf_size)
 {
     (void) af;
+    (void) remote_scope;
     (void) interf;
     (void) buf;
     (void) buf_size;