diff --git a/extra/benchmark/spectral-norm/spectral-norm.factor b/extra/benchmark/spectral-norm/spectral-norm.factor
index 4f93367b8a..41ae5b3578 100644
--- a/extra/benchmark/spectral-norm/spectral-norm.factor
+++ b/extra/benchmark/spectral-norm/spectral-norm.factor
@@ -1,8 +1,7 @@
 ! Factor port of
 ! http://shootout.alioth.debian.org/gp4/benchmark.php?test=spectralnorm&lang=all
 USING: specialized-arrays kernel math math.functions
-math.vectors sequences sequences.private prettyprint words hints
-locals ;
+math.vectors sequences prettyprint words hints locals ;
 SPECIALIZED-ARRAY: double
 IN: benchmark.spectral-norm
 
@@ -19,13 +18,13 @@ IN: benchmark.spectral-norm
     + 1 + recip ; inline
 
 : (eval-A-times-u) ( u i j -- x )
-    tuck [ swap nth-unsafe ] [ eval-A ] 2bi* * ; inline
+    [ swap nth ] [ eval-A ] bi-curry bi* * ; inline
 
 : eval-A-times-u ( n u -- seq )
     [ (eval-A-times-u) ] inner-loop ; inline
 
 : (eval-At-times-u) ( u i j -- x )
-    tuck [ swap nth-unsafe ] [ swap eval-A ] 2bi* * ; inline
+    [ swap nth ] [ swap eval-A ] bi-curry bi* * ; inline
 
 : eval-At-times-u ( u n -- seq )
     [ (eval-At-times-u) ] inner-loop ; inline