diff --git a/hw/misc/edu.c b/hw/misc/edu.c
index 91af452c9e..65fc32b928 100644
--- a/hw/misc/edu.c
+++ b/hw/misc/edu.c
@@ -289,6 +289,15 @@ static const MemoryRegionOps edu_mmio_ops = {
     .read = edu_mmio_read,
     .write = edu_mmio_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
+    .valid = {
+        .min_access_size = 4,
+        .max_access_size = 8,
+    },
+    .impl = {
+        .min_access_size = 4,
+        .max_access_size = 8,
+    },
+
 };
 
 /*