diff --git a/layouts/shortcodes/tab.html b/layouts/shortcodes/tab.html
index b420770..b5a753d 100644
--- a/layouts/shortcodes/tab.html
+++ b/layouts/shortcodes/tab.html
@@ -1,4 +1,4 @@
-{{- $group := printf "tabs-%s" (default .Parent.Ordinal (.Parent.Get 0)) -}}
+{{- $group := printf "tabs-%v" (default .Parent.Ordinal (.Parent.Get 0)) -}}
 {{- $tab := printf "%s-%d" $group .Ordinal }}
 <input type="radio" class="toggle" name="{{ $group }}" id="{{ $tab }}" {{ if not .Ordinal }}checked="checked"{{ end }} />
 <label for="{{ $tab }}">