diff --git a/scripts/utils.sh b/scripts/utils.sh
index 33a47d0..a296192 100644
--- a/scripts/utils.sh
+++ b/scripts/utils.sh
@@ -4,7 +4,7 @@ get_tmux_option() {
   local option=$1
   local default_value=$2
   local option_value=$(tmux show-option -gqv "$option")
-  if [ -z $option_value ]; then
+  if [ -z "$option_value" ]; then
     echo $default_value
   else
     echo $option_value