diff --git a/usr.sbin/bhyve/bhyverun.c b/usr.sbin/bhyve/bhyverun.c
--- a/usr.sbin/bhyve/bhyverun.c
+++ b/usr.sbin/bhyve/bhyverun.c
@@ -1536,7 +1536,8 @@
 	}
 
 	error = smbios_build(ctx);
-	assert(error == 0);
+	if (error != 0)
+		exit(4);
 
 	if (get_config_bool("acpi_tables")) {
 		error = acpi_build(ctx, guest_ncpus);
diff --git a/usr.sbin/bhyve/smbiostbl.c b/usr.sbin/bhyve/smbiostbl.c
--- a/usr.sbin/bhyve/smbiostbl.c
+++ b/usr.sbin/bhyve/smbiostbl.c
@@ -666,8 +666,10 @@
 		uint32_t	status;
 
 		uuid_from_string(guest_uuid_str, &uuid, &status);
-		if (status != uuid_s_ok)
+		if (status != uuid_s_ok) {
+			EPRINTLN("Invalid UUID");
 			return (-1);
+		}
 
 		uuid_enc_le(&type1->uuid, &uuid);
 	} else {