diff --git a/meta-digi-arm/conf/machine/include/ccimx6ul.inc b/meta-digi-arm/conf/machine/include/ccimx6ul.inc
index 37bd47106..9d5e91d82 100644
--- a/meta-digi-arm/conf/machine/include/ccimx6ul.inc
+++ b/meta-digi-arm/conf/machine/include/ccimx6ul.inc
@@ -53,7 +53,7 @@ TRUSTFENCE_SIGN_MODE = "HAB"
 
 # SWUpdate sw-description configuration
 BOOTFS_EXT ?= ".boot.ubifs"
-ROOTFS_EXT ?= ".ubifs"
+ROOTFS_EXT ?= '${@bb.utils.contains("IMAGE_FEATURES", "read-only-rootfs", ".squashfs", ".ubifs", d)}'
 
 BOOT_DEV_NAME ?= "linux"
 ROOTFS_DEV_NAME ?= "rootfs"
diff --git a/meta-digi-arm/conf/machine/include/ccmp1.inc b/meta-digi-arm/conf/machine/include/ccmp1.inc
index 3b2a60e83..d093790e3 100644
--- a/meta-digi-arm/conf/machine/include/ccmp1.inc
+++ b/meta-digi-arm/conf/machine/include/ccmp1.inc
@@ -19,7 +19,7 @@ DEY_BUILD_PLATFORM = "STM"
 
 # SWUpdate sw-description configuration
 BOOTFS_EXT ?= ".boot.ubifs"
-ROOTFS_EXT ?= ".ubifs"
+ROOTFS_EXT ?= '${@bb.utils.contains("IMAGE_FEATURES", "read-only-rootfs", ".squashfs", ".ubifs", d)}'
 
 BOOT_DEV_NAME ?= "linux"
 ROOTFS_DEV_NAME ?= "rootfs"