diff --git a/kernel/configs/fragments/x86_64/mmio.conf b/kernel/configs/fragments/x86_64/mmio.conf
new file mode 100644
index 000000000..be45a7a69
--- /dev/null
+++ b/kernel/configs/fragments/x86_64/mmio.conf
@@ -0,0 +1,5 @@
+# x86 specific mmio related items
+
+# Next config are required for firecracker
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y