diff --git a/debian/changelog b/debian/changelog
index d62bf3ba02..50386d52ca 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+libvirt (11.9.0+nvidia3-1) noble; urgency=medium
+
+  * NVIDIA: SAUCE: qemu: Use pci_bus to identify multi-smmuv3 model
+
+ -- Nathan Chen <nathanc@nvidia.com>  Tue, 02 Dec 2025 11:08:48 -0800
+
 libvirt (11.9.0+nvidia2-1) noble; urgency=medium
 
   * Update vEGM series to match RFCv3.
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index dd949c82bd..580d9184ba 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -7347,7 +7347,7 @@ qemuBuildMachineCommandLine(virCommand *cmd,
     if (qemuAppendDomainFeaturesMachineParam(&buf, def, qemuCaps) < 0)
         return -1;
 
-    if (def->niommus == 1) {
+    if (def->iommus && def->iommus[0]->pci_bus < 0) {
         switch (def->iommus[0]->model) {
         case VIR_DOMAIN_IOMMU_MODEL_SMMUV3:
             virBufferAddLit(&buf, ",iommu=smmuv3");
diff --git a/src/qemu/qemu_postparse.c b/src/qemu/qemu_postparse.c
index 211070ee40..a52c64c9c6 100644
--- a/src/qemu/qemu_postparse.c
+++ b/src/qemu/qemu_postparse.c
@@ -1559,7 +1559,7 @@ qemuDomainDefEnableDefaultFeatures(virDomainDef *def,
      * domain already has IOMMU without inremap. This will be fixed in
      * qemuDomainIOMMUDefPostParse() but there domain definition can't be
      * modified so change it now. */
-    if (def->iommus && def->niommus == 1 &&
+    if (def->iommus && def->iommus[0]->pci_bus < 0 &&
         (def->iommus[0]->intremap == VIR_TRISTATE_SWITCH_ON ||
         qemuDomainNeedsIOMMUWithEIM(def)) &&
         def->features[VIR_DOMAIN_FEATURE_IOAPIC] == VIR_DOMAIN_IOAPIC_NONE) {