diff --git a/acorn.js b/acorn.js
index 97ccf2c993..ca5e8eb731 100644
--- a/acorn.js
+++ b/acorn.js
@@ -43,7 +43,7 @@
     input = String(inpt); inputLen = input.length;
     setOptions(opts);
     initTokenState();
-    var startPos = options.locations ? [tokStart, new Position] : tokStart;
+    var startPos = options.locations ? [tokPos, new Position] : tokPos;
     initParserState();
     return parseTopLevel(options.program || startNodeAt(startPos));
   };