diff --git a/www/index.html b/www/index.html
index d95d384b6..857726f9a 100644
--- a/www/index.html
+++ b/www/index.html
@@ -312,7 +312,7 @@ End of search list.
      <ul>
        <li><code>CC=clang CXX=clang++ cmake -G "Unix Makefiles"
                 -DLIBCXX_CXX_ABI=libcxxrt
-                -DLIBCXX_LIBCXXABI_INCLUDE_PATHS="&lt;libcxxrt-source-dir&gt;/src"
+                -DLIBCXX_LIBCXXRT_INCLUDE_PATHS="&lt;libcxxrt-source-dir&gt;/src"
                 -DCMAKE_BUILD_TYPE=Release
                 -DCMAKE_INSTALL_PREFIX=/usr
                 &lt;libc++-source-dir&gt;</code></li>