diff --git a/packages/babylon/test/bench.html b/packages/babylon/test/bench.html
index fb42472714a5..b76338818d5f 100644
--- a/packages/babylon/test/bench.html
+++ b/packages/babylon/test/bench.html
@@ -35,7 +35,7 @@ <h1>Acorn/Esprima/UglifyJS speed comparison</h1>
 
 <script>
   function runAcorn(code, locations) {
-    acorn.parse(code, {linePositions: locations});
+    acorn.parse(code, {locations: locations});
   }
   function runEsprima(code, locations) {
     esprima.parse(code, {loc: locations});