diff --git a/src/vm.sh b/src/vm.sh
index fdffb3f..dc4b534 100755
--- a/src/vm.sh
+++ b/src/vm.sh
@@ -18,7 +18,7 @@ qemu-system-x86_64 \
     -boot d \
     -cdrom win.iso \
     -drive file=/dev/sdb,cache=none,if=virtio \
-    -spice port=${SPICE_PORT},disable-ticketing \
+    -spice port=${SPICE_PORT},disable-ticketing=on \
     -device virtio-serial \
     -chardev spicevmc,id=vdagent,name=vdagent \
     -device virtserialport,chardev=vdagent,name=com.redhat.spice.0