diff --git a/CHANGES b/CHANGES
index c9fb9f773..1f8c841b9 100644
--- a/CHANGES
+++ b/CHANGES
@@ -23,6 +23,7 @@ Bugs fixed
 * #3004: Invalid link types "top" and "up" are used
 * #3009: Bad rendering of parsed-literals in LaTeX since Sphinx 1.4.4
 * #3000: ``option`` directive generates invalid HTML anchors
+* #2984: Invalid HTML has been generated if `html_split_index` enabled
 
 Documentation
 -------------
diff --git a/sphinx/themes/basic/genindex-single.html b/sphinx/themes/basic/genindex-single.html
index 1fe668710..e1da78ab5 100644
--- a/sphinx/themes/basic/genindex-single.html
+++ b/sphinx/themes/basic/genindex-single.html
@@ -36,7 +36,7 @@
   {%- for column in entries|slice(2) if column %}
   <td style="width: 33%; vertical-align: top;"><ul>
     {%- for entryname, (links, subitems, _) in column %}
-      <li>{{ indexentries(entryname, links) }}</li>
+      <li>{{ indexentries(entryname, links) }}
       {%- if subitems %}
       <ul>
       {%- for subentryname, subentrylinks in subitems %}