diff --git a/Formula/libdnet.rb b/Formula/libdnet.rb
index 341b10e6b2..2d75459a60 100644
--- a/Formula/libdnet.rb
+++ b/Formula/libdnet.rb
@@ -6,6 +6,13 @@ class Libdnet < Formula
   md5 '9253ef6de1b5e28e9c9a62b882e44cc9'
 
   def install
+    # "manual" autoreconf to get '.dylib' extension on shared lib
+    system "aclocal --force -I config"
+    system "glibtoolize --copy --force"
+    system "autoconf --force"
+    system "autoheader --force"
+    system "automake --add-missing --copy --force-missing"
+
     system "./configure", "--disable-debug", "--disable-dependency-tracking",
                           "--prefix=#{prefix}",
                           "--mandir=#{man}"