diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index c7a0a2878a..a7dfddd69e 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -200,6 +200,7 @@ static const MemoryRegionOps raven_io_ops = {
     .write = raven_io_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
     .impl.max_access_size = 4,
+    .impl.unaligned = true,
     .valid.unaligned = true,
 };