diff --git a/etc/codecs.conf b/etc/codecs.conf
index d6e7030832..232618743f 100644
--- a/etc/codecs.conf
+++ b/etc/codecs.conf
@@ -92,6 +92,7 @@ videocodec mpng
   status working
   comment "Gray scaled PNG with Alpha channel not supported"
   fourcc mpng,MPNG
+  fourcc "png " ; for PNG-encoded Quicktime files
   dll "libpng"
   driver mpng
   out BGR32,BGR24