diff --git a/contrib/alien.factor b/contrib/alien.factor
index ef09c4cf00..f6fed758ec 100644
--- a/contrib/alien.factor
+++ b/contrib/alien.factor
@@ -1,4 +1,4 @@
-
+USING: kernel alien sequences ;
 IN: alien-contrib
 
 : copy-seq-to-float-array ( seq byte-array -- )
@@ -8,3 +8,5 @@ swap dup length [ pick set-float-nth ] 2each ;
 dup length "float" <c-array> copy-seq-to-float-array ;
 
 : float-array>array ( byte-array n -- array ) [ swap float-nth ] map-with ;
+
+PROVIDE: contrib/alien ;
\ No newline at end of file