diff --git a/extra/benchmark/benchmark.factor b/extra/benchmark/benchmark.factor
index 01e7d2c78e..bd13455357 100755
--- a/extra/benchmark/benchmark.factor
+++ b/extra/benchmark/benchmark.factor
@@ -6,7 +6,7 @@ continuations debugger ;
 IN: benchmark
 
 : run-benchmark ( vocab -- result )
-  [ [ run ] benchmark ] [ error. drop f f ] recover 2array ;
+  [ dup require [ run ] benchmark ] [ error. drop f f ] recover 2array ;
 
 : run-benchmarks ( -- assoc )
   "benchmark" all-child-vocabs values concat [ vocab-name ] map