diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index 2c4f3dff19..57d8054ccb 100644
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -2035,6 +2035,11 @@ CURLcode Curl_ossl_verifyhost(struct Curl_easy *data, struct connectdata *conn,
   Curl_conn_get_host(data, FIRSTSOCKET, &hostname, &dispname, &port);
   hostlen = strlen(hostname);
 
+#ifndef ENABLE_IPV6
+  /* Silence compiler warnings for unused params */
+  (void) conn;
+#endif
+
 #ifdef ENABLE_IPV6
   if(conn->bits.ipv6_ip &&
      Curl_inet_pton(AF_INET6, hostname, &addr)) {