diff --git a/hw/pc_piix.c b/hw/pc_piix.c
index 265ccb23d4..b9bb09d1e0 100644
--- a/hw/pc_piix.c
+++ b/hw/pc_piix.c
@@ -343,6 +343,22 @@ static QEMUMachine pc_machine_v0_14 = {
             .driver   = "qxl-vga",
             .property = "revision",
             .value    = stringify(2),
+        },{
+            .driver   = "virtio-blk-pci",
+            .property = "event_idx",
+            .value    = "off",
+        },{
+            .driver   = "virtio-serial-pci",
+            .property = "event_idx",
+            .value    = "off",
+        },{
+            .driver   = "virtio-net-pci",
+            .property = "event_idx",
+            .value    = "off",
+        },{
+            .driver   = "virtio-balloon-pci",
+            .property = "event_idx",
+            .value    = "off",
         },
         { /* end of list */ }
     },
@@ -382,6 +398,10 @@ static QEMUMachine pc_machine_v0_13 = {
             .driver   = "virtio-net-pci",
             .property = "event_idx",
             .value    = "off",
+        },{
+            .driver   = "virtio-balloon-pci",
+            .property = "event_idx",
+            .value    = "off",
         },{
             .driver   = "AC97",
             .property = "use_broken_id",
@@ -429,6 +449,10 @@ static QEMUMachine pc_machine_v0_12 = {
             .driver   = "virtio-net-pci",
             .property = "event_idx",
             .value    = "off",
+        },{
+            .driver   = "virtio-balloon-pci",
+            .property = "event_idx",
+            .value    = "off",
         },{
             .driver   = "AC97",
             .property = "use_broken_id",
@@ -484,6 +508,10 @@ static QEMUMachine pc_machine_v0_11 = {
             .driver   = "virtio-net-pci",
             .property = "event_idx",
             .value    = "off",
+        },{
+            .driver   = "virtio-balloon-pci",
+            .property = "event_idx",
+            .value    = "off",
         },{
             .driver   = "AC97",
             .property = "use_broken_id",
@@ -551,6 +579,10 @@ static QEMUMachine pc_machine_v0_10 = {
             .driver   = "virtio-net-pci",
             .property = "event_idx",
             .value    = "off",
+        },{
+            .driver   = "virtio-balloon-pci",
+            .property = "event_idx",
+            .value    = "off",
         },{
             .driver   = "AC97",
             .property = "use_broken_id",