diff --git a/Formula/root@5.rb b/Formula/root@5.rb
new file mode 100644
index 0000000000..b3643b2659
--- /dev/null
+++ b/Formula/root@5.rb
@@ -0,0 +1,88 @@
+class RootAT5 < Formula
+  desc "Object oriented framework for large scale data analysis"
+  homepage "https://root.cern.ch"
+  url "https://root.cern.ch/download/root_v5.34.36.source.tar.gz"
+  version "5.34.36"
+  sha256 "fc868e5f4905544c3f392cc9e895ef5571a08e48682e7fe173bd44c0ba0c7dcd"
+  revision 3
+
+  keg_only :versioned_formula
+
+  if MacOS.version == :sierra
+    # Same as https://root.cern.ch/gitweb/?p=root.git;a=patch;h=b86b8376e0c49d45cd909619bbf058d45398b9a9
+    # but with the change to LICENSE.txt removed to prevent it from failing
+    # Only needed so patch below can apply successfully
+    patch do
+      url "https://gist.githubusercontent.com/ilovezfs/df76b33d0e4da8243508d44e8ce9eda9/raw/fd149d6dafcae4aae5dbbc86e7ea2bef7430274f/gistfile1.txt"
+      sha256 "4214bc69f46c97f4e2d545c3942d8ec158105e4059f25f7f2323671377603e3f"
+    end
+
+    # Patch for macOS Sierra; remove for > 5.34.36
+    # Already fixed in the v5-34-00-patches branch
+    patch do
+      url "https://root.cern.ch/gitweb/?p=root.git;a=patch;h=c06fdeae0b3b4d627aacef2bda9df0acd079626b"
+      sha256 "90b8cbf99d6c1d6f04e0ad1ee0c1afeefa798b67151be63008f0573b5ed8d0f3"
+    end
+  end
+
+  depends_on "fftw"
+  depends_on "gsl"
+  depends_on "openssl"
+  depends_on "xrootd"
+  depends_on :x11 => :optional
+  depends_on :python if MacOS.version <= :snow_leopard
+
+  skip_clean "bin"
+
+  def install
+    args = %W[
+      --all
+      --prefix=#{prefix}
+      --elispdir=#{share}/emacs/site-lisp/#{name}
+      --etcdir=#{prefix}/etc/root
+      --mandir=#{man}
+      --disable-ruby
+      --enable-builtin-freetype
+      --enable-builtin-glew
+      --enable-mathmore
+    ]
+
+    args << "--disable-cocoa" << "--enable-x11" if build.with? "x11"
+
+    system "./configure", *args
+    system "make"
+    system "make", "install"
+    chmod 0755, Dir[bin/"*.*sh"]
+  end
+
+  def caveats; <<-EOS.undent
+    Because ROOT depends on several installation-dependent
+    environment variables to function properly, you should
+    add the following commands to your shell initialization
+    script (.bashrc/.profile/etc.), or call them directly
+    before using ROOT.
+
+    For bash users:
+      . #{opt_bin}/thisroot.sh
+    For zsh users:
+      pushd #{opt_prefix} >/dev/null; . bin/thisroot.sh; popd >/dev/null
+    For csh/tcsh users:
+      source #{opt_bin}/thisroot.csh
+    EOS
+  end
+
+  test do
+    (testpath/"test.C").write <<-EOS.undent
+      #include <iostream>
+      void test() {
+        std::cout << "Hello, world!" << std::endl;
+      }
+    EOS
+    (testpath/"test.bash").write <<-EOS.undent
+      . #{bin}/thisroot.sh
+      root -l -b -n -q test.C
+    EOS
+    assert_equal "\nProcessing test.C...\nHello, world!\n",
+      `/bin/bash test.bash`
+  end
+end