diff --git a/source3/libads/ndr.c b/source3/libads/ndr.c
index 9ee249fc8ee..397aa2ca601 100644
--- a/source3/libads/ndr.c
+++ b/source3/libads/ndr.c
@@ -39,8 +39,6 @@ void ndr_print_ads_auth_flags(struct ndr_print *ndr, const char *name, uint32_t
 
 void ndr_print_ads_struct(struct ndr_print *ndr, const char *name, const struct ads_struct *r)
 {
-	if (!r) { return; }
-
 	ndr_print_struct(ndr, name, "ads_struct");
 	ndr->depth++;
 	ndr_print_bool(ndr, "is_mine", r->is_mine);
diff --git a/source3/librpc/idl/libnet_join.idl b/source3/librpc/idl/libnet_join.idl
index 9984e9eee6a..b67400c7c1c 100644
--- a/source3/librpc/idl/libnet_join.idl
+++ b/source3/librpc/idl/libnet_join.idl
@@ -28,7 +28,7 @@ interface libnetjoin
 		[in] boolean8 create_upn,
 		[in] string upn,
 		[in] boolean8 modify_config,
-		[in] ads_struct *ads,
+		[in,unique] ads_struct *ads,
 		[in] boolean8 debug,
 		[in] boolean8 use_kerberos,
 		[in] netr_SchannelType secure_channel_type,
@@ -56,7 +56,7 @@ interface libnetjoin
 		[in] boolean8 delete_machine_account,
 		[in] boolean8 modify_config,
 		[in] dom_sid *domain_sid,
-		[in] ads_struct *ads,
+		[in,unique] ads_struct *ads,
 		[in] boolean8 debug,
 		[in] boolean8 use_kerberos,
 		[in,noprint] messaging_context *msg_ctx,