1 files changed, 1 insertions, 0 deletions
diff --git a/vl.c b/vl.c
index 0ca71519b5..1afe36e6e9 100644
--- a/vl.c
+++ b/vl.c
@@ -9407,6 +9407,7 @@ int main(int argc, char **argv)
         }
     }
 
+    machine->max_cpus = machine->max_cpus ?: 1; /* Default to UP */
     if (smp_cpus > machine->max_cpus) {
         fprintf(stderr, "Number of SMP cpus requested (%d), exceeds max cpus "
                 "supported by machine `%s' (%d)\n", smp_cpus,  machine->name,