diff --git a/Formula/opusfile.rb b/Formula/opusfile.rb
index cbf3e7ba436..1312cac6e8d 100644
--- a/Formula/opusfile.rb
+++ b/Formula/opusfile.rb
@@ -5,7 +5,12 @@ class Opusfile < Formula
   url 'http://downloads.xiph.org/releases/opus/opusfile-0.5.tar.gz'
   sha1 '1ba9dabbbaa35034af8167661a918df6c003317e'
 
-  head 'https://git.xiph.org/opusfile.git'
+  head do
+    url "https://git.xiph.org/opusfile.git"
+    depends_on "autoconf" => :build
+    depends_on "automake" => :build
+    depends_on "libtool" => :build
+  end
 
   depends_on 'pkg-config' => :build
   depends_on 'opus'