diff --git a/ext/libpng/gstpngenc.c b/ext/libpng/gstpngenc.c
index 74cb4938a8..924439f2e3 100644
--- a/ext/libpng/gstpngenc.c
+++ b/ext/libpng/gstpngenc.c
@@ -53,6 +53,8 @@ static void	gst_pngenc_init		(GstPngEnc *pngenc);
 
 static void	gst_pngenc_chain	(GstPad *pad, GstData *_data);
 
+GstPadTemplate *pngenc_src_template, *pngenc_sink_template;
+
 static GstElementClass *parent_class = NULL;