diff --git a/packages/helpers-lib/parse-code-chunk-to-AST.js b/packages/helpers-lib/parse-code-chunk-to-AST.js
index 9e1c1840a..75490e5b7 100644
--- a/packages/helpers-lib/parse-code-chunk-to-AST.js
+++ b/packages/helpers-lib/parse-code-chunk-to-AST.js
@@ -87,7 +87,7 @@ function checkActionBlock(src, yylloc) {
     // make sure reasonable line numbers, etc. are reported in any
     // potential parse errors by pushing the source code down:
     if (yylloc && yylloc.first_line > 0) {
-        var cnt = yylloc.first_line + 1;
+        var cnt = yylloc.first_line;
         var lines = new Array(cnt);
         src = lines.join('\n') + src;
     }