diff --git a/pc-bios/s390-ccw/virtio-net.c b/pc-bios/s390-ccw/virtio-net.c
index f9854a22c3..578c89d0c5 100644
--- a/pc-bios/s390-ccw/virtio-net.c
+++ b/pc-bios/s390-ccw/virtio-net.c
@@ -51,6 +51,8 @@ int virtio_net_init(void *mac_addr)
     void *buf;
     int i;
 
+    rx_last_idx = 0;
+
     vdev->guest_features[0] = VIRTIO_NET_F_MAC_BIT;
     virtio_setup_ccw(vdev);