diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index 6d0f9dd37a..573c98a08b 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -374,7 +374,7 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
 
     if (PCI_COMMAND == address) {
         if (!(val & PCI_COMMAND_MASTER)) {
-            proxy->vdev->status &= !VIRTIO_CONFIG_S_DRIVER_OK;
+            proxy->vdev->status &= ~VIRTIO_CONFIG_S_DRIVER_OK;
         }
     }