diff --git a/hw/dma/xilinx_axidma.c b/hw/dma/xilinx_axidma.c
index f313453495..498fc17d8a 100644
--- a/hw/dma/xilinx_axidma.c
+++ b/hw/dma/xilinx_axidma.c
@@ -633,7 +633,7 @@ static const TypeInfo axidma_info = {
 static const TypeInfo xilinx_axidma_data_stream_info = {
     .name          = TYPE_XILINX_AXI_DMA_DATA_STREAM,
     .parent        = TYPE_OBJECT,
-    .instance_size = sizeof(struct XilinxAXIDMAStreamSlave),
+    .instance_size = sizeof(XilinxAXIDMAStreamSlave),
     .class_init    = xilinx_axidma_stream_class_init,
     .class_data    = &xilinx_axidma_data_stream_class,
     .interfaces = (InterfaceInfo[]) {
@@ -645,7 +645,7 @@ static const TypeInfo xilinx_axidma_data_stream_info = {
 static const TypeInfo xilinx_axidma_control_stream_info = {
     .name          = TYPE_XILINX_AXI_DMA_CONTROL_STREAM,
     .parent        = TYPE_OBJECT,
-    .instance_size = sizeof(struct XilinxAXIDMAStreamSlave),
+    .instance_size = sizeof(XilinxAXIDMAStreamSlave),
     .class_init    = xilinx_axidma_stream_class_init,
     .class_data    = &xilinx_axidma_control_stream_class,
     .interfaces = (InterfaceInfo[]) {