diff --git a/layouts/_partials/docs/toc-show.html b/layouts/_partials/docs/toc-show.html
index 21122a1..0b9f932 100644
--- a/layouts/_partials/docs/toc-show.html
+++ b/layouts/_partials/docs/toc-show.html
@@ -1,5 +1,4 @@
-{{ return default true (
-  and
-    (default .Site.Params.BookToC .Params.BookToC)
+{{ return and
+    (default .Site.Params.BookToC .Params.BookToC | default true)
     (not (eq .TableOfContents "<nav id=\"TableOfContents\"></nav>"))
-) }}
\ No newline at end of file
+}}
\ No newline at end of file