diff --git a/spells/cantrips/menu b/spells/cantrips/menu
index f8441d8..17bec37 100755
--- a/spells/cantrips/menu
+++ b/spells/cantrips/menu
@@ -55,7 +55,7 @@ done
 
 # Make sure the menu items don't wrap, multiline menu items are not supported
 window_width=$(fathom-terminal -w)
-if [ "${max_name_length:0}" -gt "${window_width:80}" ]; then
+if [ "${max_name_length:-0}" -gt "${window_width:-80}" ]; then
 	max_name_length=$window_width
 fi