diff --git a/recipes-sysmobts/sysmobts2100-devtools/files/mkrootfsimg b/recipes-sysmobts/sysmobts2100-devtools/files/mkrootfsimg
index 1662aca..96e173c 100755
--- a/recipes-sysmobts/sysmobts2100-devtools/files/mkrootfsimg
+++ b/recipes-sysmobts/sysmobts2100-devtools/files/mkrootfsimg
@@ -14,7 +14,7 @@ MOUNTDIR="$(mktemp -d)"
 
 mv $IMGFILE $IMGFILE-old || true
 dd if=/dev/zero of=${IMGFILE} bs=128M count=1
-/sbin/mkfs -t ext4 ${IMGFILE}
+/sbin/mkfs -t ext4 -O ^64bit ${IMGFILE}
 sudo mount -t ext4 -o loop ${IMGFILE} ${MOUNTDIR}/
 sudo tar -zxf ${IMGTAR} -C ${MOUNTDIR}/
 sync
diff --git a/recipes-sysmobts/sysmobts2100-devtools/files/mksdcard b/recipes-sysmobts/sysmobts2100-devtools/files/mksdcard
index c88f6fa..045f0bc 100755
--- a/recipes-sysmobts/sysmobts2100-devtools/files/mksdcard
+++ b/recipes-sysmobts/sysmobts2100-devtools/files/mksdcard
@@ -61,8 +61,8 @@ echo " Done"
 
 echo -n "Formating filesystems..."
 ${MKFSVFAT} -F 32 -n "BOOT" ${1}1
-${MKFSEXT} -q -F -L "master" ${1}2
-${MKFSEXT} -q -F -L "alt" ${1}3
+${MKFSEXT} -O ^64bit -q -F -L "master" ${1}2
+${MKFSEXT} -O ^64bit -q -F -L "alt" ${1}3
 ${MKFSEXT} -q -F -L "storage" ${1}4
 echo " Done"