diff --git a/classes/zephyr-qemuboot.bbclass b/classes/zephyr-qemuboot.bbclass
index 42dc46e..39de3f0 100644
--- a/classes/zephyr-qemuboot.bbclass
+++ b/classes/zephyr-qemuboot.bbclass
@@ -4,6 +4,7 @@ KERNEL_IMAGETYPE = "${PN}.elf"
 QB_DEFAULT_FSTYPE = "elf"
 QB_NETWORK_DEVICE = "none"
 QB_NET = "none"
+QB_ROOTFS = "none"
 
 IMAGE_LINK_NAME = "${PN}-image-${MACHINE}"