diff --git a/src/librustdoc/html/layout.rs b/src/librustdoc/html/layout.rs
index bbc41865a8d..70e9d004160 100644
--- a/src/librustdoc/html/layout.rs
+++ b/src/librustdoc/html/layout.rs
@@ -48,7 +48,7 @@ r##"<!DOCTYPE html>
     {favicon}
     {in_header}
 </head>
-<body>
+<body class="rustdoc">
     <!--[if lte IE 8]>
     <div class="warning">
         This old browser is unsupported and will most likely display funky
diff --git a/src/librustdoc/markdown.rs b/src/librustdoc/markdown.rs
index 29da9462c7f..98b902f4504 100644
--- a/src/librustdoc/markdown.rs
+++ b/src/librustdoc/markdown.rs
@@ -98,7 +98,7 @@ pub fn render(input: &str, mut output: Path, matches: &getopts::Matches,
     {css}
     {in_header}
 </head>
-<body>
+<body class="rustdoc">
     <!--[if lte IE 8]>
     <div class="warning">
         This old browser is unsupported and will most likely display funky
