diff --git a/Formula/ufraw.rb b/Formula/ufraw.rb
index cecd2583d05..cfc11b91451 100644
--- a/Formula/ufraw.rb
+++ b/Formula/ufraw.rb
@@ -8,6 +8,7 @@ class Ufraw < Formula
   depends_on 'pkg-config' => :build
   depends_on 'glib'
   depends_on 'libtiff'
+  depends_on ':libpng'
   depends_on 'jpeg'
   depends_on 'little-cms'
   depends_on 'dcraw'