diff --git a/tests/ext4/018 b/tests/ext4/018
index 0116c5f7..eb6d827b 100755
--- a/tests/ext4/018
+++ b/tests/ext4/018
@@ -55,7 +55,7 @@ echo "+ check fs"
 e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
 
 echo "+ corrupt image"
-blk="$(debugfs -R 'stat /attrfile' "${SCRATCH_DEV}" 2> /dev/null | grep 'File ACL:' | sed -e 's/^.*File ACL: \([0-9]*\).*Directory.*$/\1/g')"
+blk="$(debugfs -R 'stat /attrfile' "${SCRATCH_DEV}" 2> /dev/null | grep 'File ACL:' | sed -e 's/^.*File ACL: \([0-9]*\)/\1/g')"
 $XFS_IO_PROG -f -c "pwrite -S 0x62 $((blk * blksz + 20)) 8" "${SCRATCH_DEV}" >> $seqres.full
 
 echo "+ mount image"