diff --git a/errata.html b/errata.html
index d1dba6f..2bfbd9d 100644
--- a/errata.html
+++ b/errata.html
@@ -196,6 +196,14 @@ <h3>Error o-3, outdated link to PROV-Overview</h3>
           Abstract</a>, the link to "PROV Document Overview" points to an older draft <span class="diff-del">http://www.w3.org/TR/2012/WD-prov-overview-20121211/</span> and should instead <span class="diff-add">http://www.w3.org/TR/2013/NOTE-prov-overview-20130430/</span>.</p>
       <!--p>See <a href="">original error report</a>.</p-->
     </div>
+    <div id="o-4" class="entry">
+      <h3>Error o-4, incorrect subproperty assertion for prov:hadMember</h3>
+      <p>in <a href="http://www.w3.org/TR/prov-o/#hadMember">(29) Property: prov:hadMember</a>,
+       prov:hadMember is incorrectly asserted to be a subproperty of prov:wasInfluencedBy. 
+      <span class="diff-del">has super-properties prov:wasInfluencedBy</span>
+      <!-- and should instead <span class="diff-add">http://www.w3.org/TR/2013/NOTE-prov-overview-20130430/</span>.-->
+      <p>See <a href="http://www.w3.org/mid/C0F083F7-3D6E-4744-9E81-29D9C035C140@inf.ed.ac.uk">original error report</a>.</p>
+    </div>
     <h2 class="document" id="prov-dm">Errata for <a href="http://www.w3.org/TR/2013/REC-prov-dm-20130430/">PROV-DM
         </a></h2>
     <dl>