diff --git a/src/rtos/rtos.h b/src/rtos/rtos.h
index b34604787..93b1731aa 100644
--- a/src/rtos/rtos.h
+++ b/src/rtos/rtos.h
@@ -61,7 +61,7 @@ struct rtos {
 struct rtos_reg {
 	uint32_t number;
 	uint32_t size;
-	uint8_t value[8];
+	uint8_t value[16];
 };
 
 struct rtos_type {