diff --git a/scripts/symbols.def b/scripts/symbols.def
index 0bde5fb96..0868d3f09 100644
--- a/scripts/symbols.def
+++ b/scripts/symbols.def
@@ -221,3 +221,4 @@ EXPORTS
  png_set_sCAL_fixed @213
  png_get_sCAL_fixed @214
  png_set_background_fixed @215
+ png_get_io_chunk_type @216