diff --git a/src/vz/vz_driver.c b/src/vz/vz_driver.c
index 9e8ea676e0..7b90fee378 100644
--- a/src/vz/vz_driver.c
+++ b/src/vz/vz_driver.c
@@ -292,7 +292,7 @@ vzDomainDeviceDefValidate(const virDomainDeviceDef *dev,
     vzDriverPtr driver = opaque;
 
     if (dev->type == VIR_DOMAIN_DEVICE_DISK)
-        return vzCheckUnsupportedDisk(def, dev->data.disk, driver->vzCaps);
+        return vzCheckUnsupportedDisk(def, dev->data.disk, &driver->vzCaps);
     else if (dev->type == VIR_DOMAIN_DEVICE_GRAPHICS)
         return vzCheckUnsupportedGraphics(dev->data.graphics);