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-rw-r--r--hw/i386/x86-iommu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c
index 51de519ec3..8a01a2dd25 100644
--- a/hw/i386/x86-iommu.c
+++ b/hw/i386/x86-iommu.c
@@ -88,7 +88,7 @@ static void x86_iommu_realize(DeviceState *dev, Error **errp)
         PC_MACHINE(object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE));
     QLIST_INIT(&x86_iommu->iec_notifiers);
 
-    if (!pcms) {
+    if (!pcms || !pcms->bus) {
         error_setg(errp, "Machine-type '%s' not supported by IOMMU",
                    mc->name);
         return;