diff --git a/examples/vm/x86_64-q35-base.conf b/examples/vm/x86_64-q35-base.conf
index 6842d3c..5a03d3b 100644
--- a/examples/vm/x86_64-q35-base.conf
+++ b/examples/vm/x86_64-q35-base.conf
@@ -22,6 +22,7 @@ QEMU_SYSTEM_BINARY=${QEMU_SYSTEM_X86_64}
 
 : "${GUEST_DISPLAY:="0"}"
 : "${GUEST_VIOMMU:="1"}"
+: "${GUEST_VIOMMU_ARGS:="intel-iommu,intremap=on"}"
 : "${GUEST_CPU:="host"}"
 : "${GUEST_SMP:="4"}"
 : "${GUEST_MEMORY:="8G"}"
@@ -53,7 +54,7 @@ _setup_x86_64_q35_base() {
 
   # guest iommu
   if [[ $GUEST_VIOMMU -ne 0 ]]; then
-    QEMU_PARAMS+=("-device" "intel-iommu,intremap=on")
+    QEMU_PARAMS+=("-device" "$GUEST_VIOMMU_ARGS")
   fi
 
   # simple user-level networking