diff --git a/stack.sh b/stack.sh
index 418f37b..44665c4 100755
--- a/stack.sh
+++ b/stack.sh
@@ -293,7 +293,7 @@
     # qcow images) and kvm (hardware based virtualization).  If unable to 
     # load kvm, set the libvirt type to qemu.
     sudo modprobe nbd || true
-    if ! sudo modprobe kvm; then
+    if ! -e /dev/kvm; then
         LIBVIRT_TYPE=qemu
     fi
     # User needs to be member of libvirtd group for nova-compute to use libvirt.