diff --git a/spec.html b/spec.html
index 00194d8..9ca9c48 100644
--- a/spec.html
+++ b/spec.html
@@ -205,7 +205,9 @@ <h1>Runtime Semantics: RegExpBuiltinExec ( _R_, _S_ )</h1>
     1. Perform ! CreateDataProperty(_A_, `"0"`, _matchedSubstr_).
     1. <ins>If _R_ contains any |GroupName|, then</ins>
       1. <ins>Let _groups_ be ObjectCreate(*null*).</ins>
-      1. <ins>Perform ! CreateDataProperty(_A_, `"groups"`, _groups_).</ins>
+    1. <ins>Else,</ins>
+      1. <ins>Let _groups_ be *undefined*.</ins>
+    1. <ins>Perform ! CreateDataProperty(_A_, `"groups"`, _groups_).</ins>
     1. For each integer _i_ such that _i_ &gt; 0 and _i_ &le; _n_
       1. Let _captureI_ be _i_<sup>th</sup> element of _r_'s _captures_ List.
       1. If _captureI_ is *undefined*, let _capturedValue_ be *undefined*.