diff --git a/install.sh b/install.sh
index 0785700..a2c4b2f 100755
--- a/install.sh
+++ b/install.sh
@@ -45,7 +45,7 @@ case "$1" in
 esac
 
 _fetch_sources;
-if [ $UPDATE_LITE ];
+if [ "$UPDATE_LITE" ];
 then
   _update_nanorc_lite
 else