diff --git a/hw/ide/qdev.c b/hw/ide/qdev.c
index d9b8f24bb5ed2a4d52a0c55ac99653c41789da81..6bd8d202707fa3984f2e0a1832134ac21c3a3ac6 100644
--- a/hw/ide/qdev.c
+++ b/hw/ide/qdev.c
@@ -31,6 +31,10 @@ static struct BusInfo ide_bus_info = {
     .name  = "IDE",
     .size  = sizeof(IDEBus),
     .get_fw_dev_path = idebus_get_fw_dev_path,
+    .props = (Property[]) {
+        DEFINE_PROP_UINT32("unit", IDEDevice, unit, -1),
+        DEFINE_PROP_END_OF_LIST(),
+    },
 };
 
 void ide_bus_new(IDEBus *idebus, DeviceState *dev, int bus_id)
@@ -174,7 +178,6 @@ static int ide_drive_initfn(IDEDevice *dev)
 }
 
 #define DEFINE_IDE_DEV_PROPERTIES()                     \
-    DEFINE_PROP_UINT32("unit", IDEDrive, dev.unit, -1), \
     DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),        \
     DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),  \
     DEFINE_PROP_STRING("serial",  IDEDrive, dev.serial)