diff --git a/png.h b/png.h
index 51894f4..f143742 100644
--- a/png.h
+++ b/png.h
@@ -2065,7 +2065,7 @@
 
 PNG_EXPORTA(200, png_const_bytep, png_get_io_chunk_name,
     (png_structp png_ptr), PNG_DEPRECATED);
-PNG_EXPORT(215, png_uint_32, png_get_io_chunk_type,
+PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type,
     (const_png_structp png_ptr));
 
 /* The flags returned by png_get_io_state() are the following: */