diff --git a/contrib/gl/load.factor b/contrib/gl/load.factor
index 69d7b43554..4b8d05f573 100644
--- a/contrib/gl/load.factor
+++ b/contrib/gl/load.factor
@@ -1,5 +1,5 @@
 IN: gl
-USING: alien parser sequences kernel ;
+USING: alien compiler kernel parser sequences words ;
 
 win32? [
     "gl" "opengl32.dll" "stdcall" add-library