diff --git a/spec/index.html b/spec/index.html
index 00e043e..fe2f06f 100644
--- a/spec/index.html
+++ b/spec/index.html
@@ -1607,7 +1607,7 @@ <h2>Entailment rules (Informative)</h2>
   <ol>
     <li>Add to S all the RDF (and RDFS) axiomatic triples which do not contain any container membership property IRI.</li>
     <li>For each container membership property IRI which occurs in E, add the RDF (and RDFS) axiomatic triples which contain that IRI.</li>
-    <li>If no triples were added in step 2., add the RDF (and RDFS) axiomatic triples which contain <code>rdf:_1</code>.</li>
+    <li>If no triples were added in step 2, add the RDF (and RDFS) axiomatic triples which contain <code>rdf:_1</code>.</li>
     <li>For every IRI or literal <code>aaa</code> used in E, add <code>aaa rdf:type rdfs:Resource</code> to S.</li>
     <li>Apply the rules <a>GrdfD1</a>, <a>rdfD1a</a>, and <a>rdfD2</a> (and the rules <a>rdfs1</a> through <a>rdfs13</a>),
       with D={<code>rdf:langString</code>, <code>xsd:string</code>}, to the set in all possible ways, to exhaustion.</li>