diff --git a/hw/arm/armsse.c b/hw/arm/armsse.c
index dcbff9bd8f..6381bbd94d 100644
--- a/hw/arm/armsse.c
+++ b/hw/arm/armsse.c
@@ -1160,6 +1160,7 @@ static const TypeInfo armsse_info = {
     .name = TYPE_ARMSSE,
     .parent = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(ARMSSE),
+    .class_size = sizeof(ARMSSEClass),
     .instance_init = armsse_init,
     .abstract = true,
     .interfaces = (InterfaceInfo[]) {
diff --git a/include/hw/arm/armsse.h b/include/hw/arm/armsse.h
index 84080c2299..b10173beab 100644
--- a/include/hw/arm/armsse.h
+++ b/include/hw/arm/armsse.h
@@ -220,7 +220,7 @@ typedef struct ARMSSE {
 typedef struct ARMSSEInfo ARMSSEInfo;
 
 typedef struct ARMSSEClass {
-    DeviceClass parent_class;
+    SysBusDeviceClass parent_class;
     const ARMSSEInfo *info;
 } ARMSSEClass;