diff --git a/default.revealjs b/default.revealjs
index f08f64791..dc4162820 100644
--- a/default.revealjs
+++ b/default.revealjs
@@ -26,6 +26,11 @@ $for(css)$
 $endfor$
 $else$
     <link rel="stylesheet" href="$revealjs-url$/css/theme/simple.css" id="theme">
+$endif$
+$if(theme)$
+    <link rel="stylesheet" href="$revealjs-url$/css/theme/$theme$.css" id="theme">
+$else$
+    <link rel="stylesheet" href="$revealjs-url$/css/theme/black.css" id="theme">
 $endif$
     <!-- If the query includes 'print-pdf', include the PDF print sheet -->
     <script>