diff --git a/hw/char/cadence_uart.c b/hw/char/cadence_uart.c
index f18db53bca..a7b2f2148c 100644
--- a/hw/char/cadence_uart.c
+++ b/hw/char/cadence_uart.c
@@ -110,7 +110,9 @@
 #define CADENCE_UART(obj) OBJECT_CHECK(UartState, (obj), TYPE_CADENCE_UART)
 
 typedef struct {
+    /*< private >*/
     SysBusDevice parent_obj;
+    /*< public >*/
 
     MemoryRegion iomem;
     uint32_t r[R_MAX];