diff --git a/utils/nwztools/scripts/dump_rootfs.sh b/utils/nwztools/scripts/dump_rootfs.sh
index da20e43b41..36e521ce3b 100644
--- a/utils/nwztools/scripts/dump_rootfs.sh
+++ b/utils/nwztools/scripts/dump_rootfs.sh
@@ -60,11 +60,13 @@ lcdmsg -f /usr/local/bin/font_08x12.bmp -l 0,10 "Done."
 
 # 5) Dump the root filesystem
 # Mount the root filesystem read-only and dump it
+# NOTE some platforms use ext4 with a custom mount program
+# (/usr/local/bin/icx_mount.ext4), some probably use an mtd too
 lcdmsg -f /usr/local/bin/font_08x12.bmp -l 0,12 "Dumping rootfs..."
 ROOTFS_TMP_DIR=/tmp/rootfs
 mkdir $ROOTFS_TMP_DIR
 . /install_script/constant.txt
-if ! mount -t ext2 -o ro $COMMON_ROOTFS_PARTITION $ROOTFS_TMP_DIR
+if ! mount -t ext3 -o ro $COMMON_ROOTFS_PARTITION $ROOTFS_TMP_DIR
 then
     lcdmsg -f /usr/local/bin/font_08x12.bmp -l 0,13 "ERROR: cannot mount rootfs"
 else
diff --git a/utils/nwztools/scripts/install_dualboot.sh b/utils/nwztools/scripts/install_dualboot.sh
index 08c24b7b5f..c134929312 100644
--- a/utils/nwztools/scripts/install_dualboot.sh
+++ b/utils/nwztools/scripts/install_dualboot.sh
@@ -49,9 +49,9 @@ if [ "$?" != 0 ]; then
     exit 0
 fi
 
-# NOTE some platforms use ext3 and some ext4 with a custom mount program
+# NOTE some platforms use ext4 with a custom mount program
 # (/usr/local/bin/icx_mount.ext4), some probably use an mtd too
-mount -t ext2 $COMMON_ROOTFS_PARTITION $ROOTFS_TMP_DIR
+mount -t ext3 $COMMON_ROOTFS_PARTITION $ROOTFS_TMP_DIR
 if [ "$?" != 0 ]; then
     lcdmsg -f /usr/local/bin/font_08x12.bmp -l 0,15 "ERROR: mount failed"
     sleep 3