diff --git a/src/post_modules/GL/features.pike b/src/post_modules/GL/features.pike
index 9a3a97bd3968a8f181a78bd393b146d8d44ea3dc..4db3f8eab1d2893f6a6f1117afed0049bd0aa585 100644
--- a/src/post_modules/GL/features.pike
+++ b/src/post_modules/GL/features.pike
@@ -18,6 +18,8 @@ array funcV = ({
 array func_misc = ({
   ({"glClearColor", "V+FFFF"}),
   ({"glFrustum", "VDDDDDD"}),
+  ({"glOrtho", "VDDDDDD"}),
+  ({"glViewport", "VIIII"}),
   ({"glTranslate", "V!RRR"}),
   ({"glScale", "V!RRR"}),
   ({"glRotate", "V!RRRR"}),