diff --git a/install b/install
index be2cd02..2a43c9b 100755
--- a/install
+++ b/install
@@ -53,6 +53,7 @@ cd $(dirname $BASH_SOURCE)
 fzf_base="$(pwd)"
 
 # If stdin is a tty, we are "interactive".
+interactive=
 [ -t 0 ] && interactive=yes
 
 ask() {