diff --git a/Formula/gtk+.rb b/Formula/gtk+.rb
index abfbf595e3..2d9cdccc4a 100644
--- a/Formula/gtk+.rb
+++ b/Formula/gtk+.rb
@@ -10,6 +10,8 @@ class Gtkx <Formula
   depends_on 'pkg-config'
   depends_on 'glib'
   depends_on 'jpeg'
+  depends_on 'libtiff'
+  depends_on 'pango'
   depends_on 'jasper' => :optional
   depends_on 'atk' => :optional