1 files changed, 1 insertions, 1 deletions
diff --git a/dmenu_books b/dmenu_books
index a579476..645ece8 100755
--- a/dmenu_books
+++ b/dmenu_books
@@ -5,7 +5,7 @@ printhelp () {
 }
 
 while getopts "hd:" o; do case "${o}" in
-  d) ARG="$OPTARG" ;;
+  d) ARG=${ARG:+"$ARG "}"$OPTARG" ;;
   *) printhelp ;;
 esac done