diff --git a/src/vbox/vbox_tmpl.c b/src/vbox/vbox_tmpl.c
index 68e3b053a0..be25828f7b 100644
--- a/src/vbox/vbox_tmpl.c
+++ b/src/vbox/vbox_tmpl.c
@@ -5294,7 +5294,8 @@ vboxDomainUndefineFlags(virDomainPtr dom, unsigned int flags)
 
         ((IMachine_Delete)machine->vtbl->Delete)(machine, &safeArray, &progress);
 # else
-        machine->vtbl->Delete(machine, 0, NULL, &progress);
+        vboxArray array = VBOX_ARRAY_INITIALIZER;
+        machine->vtbl->Delete(machine, 0, (IMedium**)&array, &progress);
 # endif
         if (progress != NULL) {
             progress->vtbl->WaitForCompletion(progress, -1);