diff --git a/contrib/kiss-size b/contrib/kiss-size
index 219965f..4af2944 100755
--- a/contrib/kiss-size
+++ b/contrib/kiss-size
@@ -29,7 +29,7 @@ kiss list "${1:-null}" >/dev/null || {
 # Directories in the manifest end in a trailing '/'.
 # Send the file list to 'xargs' to run through 'du',
 # this prevents du from exiting due to too many arguments
-sed -e "s|^|$KISS_ROOT|" -e 's|.*/$||' \
+sed -e "s|^|$KISS_ROOT|" -e '/.*\/$/d' -e 's/[^[:alnum:]]/\\&/g' \
     "$KISS_ROOT/var/db/kiss/installed/$1/manifest" \
     | xargs du -sk -- 2>/dev/null |