diff --git a/include/lib.sh b/include/lib.sh
index 8886cfc..2b63079 100644
--- a/include/lib.sh
+++ b/include/lib.sh
@@ -41,7 +41,7 @@ chkvars()
 {
 	for var in "$@"; do
 		eval "[ -n "\${$var+x}" ] || \$err \"$var unset\""
-		eval "[ -n "\$$var" ] || \$err \"$var unset\""
+		eval "[ -n \"\$$var\" ] || \$err \"$var unset\""
 	done; return 0
 }