diff --git a/src/context.c b/src/context.c
index dc3b8b92..a3c7aec4 100644
--- a/src/context.c
+++ b/src/context.c
@@ -1882,11 +1882,13 @@ getdns_context_set_tls_authentication(getdns_context *context,
     return GETDNS_RETURN_GOOD;
 }               /* getdns_context_set_tls_authentication_list */
 
+#ifdef HAVE_LIBUNBOUND
 static void
-set_ub_limit_outstanding_queries(struct getdns_context* context, uint16_t value) {
+set_ub_limit_outstanding_queries(getdns_context* context, uint16_t value) {
     /* num-queries-per-thread */
     set_ub_number_opt(context, "num-queries-per-thread:", value);
 }
+#endif
 /*
  * getdns_context_set_limit_outstanding_queries
  *
@@ -1896,7 +1898,9 @@ getdns_context_set_limit_outstanding_queries(struct getdns_context *context,
     uint16_t limit)
 {
     RETURN_IF_NULL(context, GETDNS_RETURN_INVALID_PARAMETER);
+#ifdef HAVE_LIBUNBOUND
     set_ub_limit_outstanding_queries(context, limit);
+#endif
     if (limit != context->limit_outstanding_queries) {
         context->limit_outstanding_queries = limit;
         dispatch_updated(context,
@@ -2268,11 +2272,13 @@ getdns_context_set_dnssec_trust_anchors(
 	return GETDNS_RETURN_GOOD;
 }               /* getdns_context_set_dnssec_trust_anchors */
 
+#ifdef HAVE_LIBUNBOUND
 static void
 set_ub_dnssec_allowed_skew(struct getdns_context* context, uint32_t value) {
     set_ub_number_opt(context, "val-sig-skew-min:", value);
     set_ub_number_opt(context, "val-sig-skew-max:", value);
 }
+#endif
 /*
  * getdns_context_set_dnssec_allowed_skew
  *
@@ -2282,7 +2288,9 @@ getdns_context_set_dnssec_allowed_skew(struct getdns_context *context,
     uint32_t value)
 {
     RETURN_IF_NULL(context, GETDNS_RETURN_INVALID_PARAMETER);
+#ifdef HAVE_LIBUNBOUND
     set_ub_dnssec_allowed_skew(context, value);
+#endif
     if (value != context->dnssec_allowed_skew) {
         context->dnssec_allowed_skew = value;
         dispatch_updated(context, GETDNS_CONTEXT_CODE_DNSSEC_ALLOWED_SKEW);
@@ -2550,6 +2558,7 @@ error:
 } /* getdns_context_set_upstream_recursive_servers */
 
 
+#ifdef HAVE_LIBUNBOUND
 static void
 set_ub_edns_maximum_udp_payload_size(struct getdns_context* context,
     int value) {
@@ -2557,6 +2566,7 @@ set_ub_edns_maximum_udp_payload_size(struct getdns_context* context,
     if (value >= 512 && value <= 65535)
     	set_ub_number_opt(context, "edns-buffer-size:", (uint16_t)value);
 }
+#endif
 
 /*
  * getdns_context_set_edns_maximum_udp_payload_size
@@ -2573,7 +2583,9 @@ getdns_context_set_edns_maximum_udp_payload_size(struct getdns_context *context,
 	if (value < 512)
 		value = 512;
 
+#ifdef HAVE_LIBUNBOUND
 	set_ub_edns_maximum_udp_payload_size(context, value);
+#endif
 	if (value != context->edns_maximum_udp_payload_size) {
 		context->edns_maximum_udp_payload_size = value;
 		dispatch_updated(context,