diff --git a/extra/opengl/glu/glu.factor b/extra/opengl/glu/glu.factor
index fe060e3553..a8404bb13a 100644
--- a/extra/opengl/glu/glu.factor
+++ b/extra/opengl/glu/glu.factor
@@ -4,12 +4,16 @@ USING: alien alien.libraries alien.syntax kernel sequences words system
 combinators ;
 IN: opengl.glu
 
+<<
+
 os {
     { [ dup macosx? ] [ drop ] }
     { [ dup windows? ] [ drop ] }
     { [ dup unix? ] [ drop "glu" "libGLU.so.1" "cdecl" add-library ] }
 } cond
 
+>>
+
 LIBRARY: glu
  
 ! These are defined as structs in glu.h, but we only ever use pointers to them