diff --git a/hw/sparc/sun4m_iommu.c b/hw/sparc/sun4m_iommu.c
index 6f765e97e4..3d6fcdf576 100644
--- a/hw/sparc/sun4m_iommu.c
+++ b/hw/sparc/sun4m_iommu.c
@@ -368,7 +368,7 @@ static void iommu_init(Object *obj)
     sysbus_init_mmio(dev, &s->iomem);
 }
 
-static Property iommu_properties[] = {
+static const Property iommu_properties[] = {
     DEFINE_PROP_UINT32("version", IOMMUState, version, 0),
     DEFINE_PROP_END_OF_LIST(),
 };