diff --git a/reference/mysqli/book.xml b/reference/mysqli/book.xml
index 531542c0..5e5e1bd0 100644
--- a/reference/mysqli/book.xml
+++ b/reference/mysqli/book.xml
@@ -52,7 +52,6 @@
  &reference.mysqli.persistconns;
  &reference.mysqli.constants;
  &reference.mysqli.notes;
- &reference.mysqli.summary;
  &reference.mysqli.mysqli;
  &reference.mysqli.mysqli-stmt;
  &reference.mysqli.mysqli-result;