diff --git a/scripts/kamp-buffers b/scripts/kamp-buffers
index dab723b..37919af 100755
--- a/scripts/kamp-buffers
+++ b/scripts/kamp-buffers
@@ -13,7 +13,6 @@ usage() {
     exit 2
 }
 
-session="$KAKOUNE_SESSION"
 while getopts 's:h' OPTION; do
     case $OPTION in
     s)
@@ -26,6 +25,8 @@ while getopts 's:h' OPTION; do
 done
 shift $(($OPTIND - 1))
 
+: ${session:=$KAKOUNE_SESSION}
+
 exec_cmd=
 if kamp ctx -c >/dev/null 2>/dev/null; then
     exec_cmd="kamp -s $session send buffer {}"