diff --git a/default.dzslides b/default.dzslides
index 4377cc066..d7f22dd91 100644
--- a/default.dzslides
+++ b/default.dzslides
@@ -9,7 +9,9 @@ $if(date-meta)$
 $endif$
   <title>$if(title-prefix)$$title-prefix$ - $endif$$if(pagetitle)$$pagetitle$$endif$</title>
 $if(highlighting-css)$
+  <style type="text/css">
 $highlighting-css$
+  </style>
 $endif$
 $if(css)$
 $for(css)$
diff --git a/default.html b/default.html
index b92025f6c..c231b8fa5 100644
--- a/default.html
+++ b/default.html
@@ -12,7 +12,9 @@ $if(date-meta)$
 $endif$
   <title>$if(title-prefix)$$title-prefix$ - $endif$$if(pagetitle)$$pagetitle$$endif$</title>
 $if(highlighting-css)$
+  <style type="text/css">
 $highlighting-css$
+  </style>
 $endif$
 $for(css)$
   <link rel="stylesheet" href="$css$" $if(html5)$$else$type="text/css" $endif$/>
diff --git a/default.s5 b/default.s5
index 86623c6cb..03008df88 100644
--- a/default.s5
+++ b/default.s5
@@ -15,7 +15,9 @@ $endif$
   <meta name="defaultView" content="slideshow" />
   <meta name="controlVis" content="hidden" />
 $if(highlighting-css)$
+  <style type="text/css">
 $highlighting-css$
+  </style>
 $endif$
 $for(css)$
   <link rel="stylesheet" href="$css$" type="text/css" />
diff --git a/default.slidy b/default.slidy
index 4d8d38a90..86ccfd28d 100644
--- a/default.slidy
+++ b/default.slidy
@@ -14,7 +14,9 @@ $if(date-meta)$
 $endif$
   <title>$if(title-prefix)$$title-prefix$ - $endif$$if(pagetitle)$$pagetitle$$endif$</title>
 $if(highlighting-css)$
+  <style type="text/css">
 $highlighting-css$
+  </style>
 $endif$
   <link rel="stylesheet" type="text/css" media="screen, projection, print"
     href="$slidy-url$/styles/slidy.css" />