diff --git a/packages/libx11.rb b/packages/libx11.rb
index 546536586..352619317 100644
--- a/packages/libx11.rb
+++ b/packages/libx11.rb
@@ -13,6 +13,8 @@ class Libx11 < Package
   depends_on 'inputproto'
   depends_on 'xextproto'
   depends_on 'libxtrans'
+  depends_on 'libxau'
+  depends_on 'pthread_stubs'
   
   def self.build
     system "./configure"