diff --git a/extra/opengl/opengl.factor b/extra/opengl/opengl.factor
index f84aac56de..4ea91b867b 100755
--- a/extra/opengl/opengl.factor
+++ b/extra/opengl/opengl.factor
@@ -2,9 +2,10 @@
 ! Portions copyright (C) 2007 Eduardo Cavazos.
 ! Portions copyright (C) 2008 Joe Groff.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: alien alien.c-types continuations kernel libc math macros namespaces
-math.vectors math.constants math.functions math.parser opengl.gl opengl.glu
-combinators arrays sequences splitting words ;
+USING: alien alien.c-types continuations kernel libc math macros
+namespaces math.vectors math.constants math.functions
+math.parser opengl.gl opengl.glu combinators arrays sequences
+splitting words byte-arrays ;
 IN: opengl
 
 : coordinates [ first2 ] 2apply ;