diff --git a/stack.sh b/stack.sh
index c7c5293..a4543ef 100755
--- a/stack.sh
+++ b/stack.sh
@@ -195,8 +195,8 @@
     local testval=$2
 
     [[ -z "$testval" ]] && { echo "$default"; return; }
-    [[ "0 no false" =~ "$testval" ]] && { echo "False"; return; }
-    [[ "1 yes true" =~ "$testval" ]] && { echo "True"; return; }
+    [[ "0 no false False FALSE" =~ "$testval" ]] && { echo "False"; return; }
+    [[ "1 yes true True TRUE" =~ "$testval" ]] && { echo "True"; return; }
     echo "$default"
 }