diff --git a/hw/ppc/spapr_rtc.c b/hw/ppc/spapr_rtc.c
index 34b27db709..b591a8ee23 100644
--- a/hw/ppc/spapr_rtc.c
+++ b/hw/ppc/spapr_rtc.c
@@ -200,7 +200,6 @@ static const TypeInfo spapr_rtc_info = {
     .name          = TYPE_SPAPR_RTC,
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(sPAPRRTCState),
-    .class_size = sizeof(XICSStateClass),
     .class_init    = spapr_rtc_class_init,
 };