diff --git a/spec.html b/spec.html
index b14842967ff..b3d6f6185c2 100644
--- a/spec.html
+++ b/spec.html
@@ -22677,7 +22677,7 @@ <h1>Object.getOwnPropertyDescriptors ( _O_ )</h1>
           1. Repeat, for each element _key_ of _ownKeys_ in List order,
             1. Let _desc_ be ? _obj_.[[GetOwnProperty]](_key_).
             1. Let _descriptor_ be ! FromPropertyDescriptor(_desc_).
-            1. Perform ! CreateDataProperty(_descriptors_, _key_, _descriptor_).
+            1. If _descriptor_ is not *undefined*, perform ! CreateDataProperty(_descriptors_, _key_, _descriptor_).
           1. Return _descriptors_.
         </emu-alg>
       </emu-clause>