diff --git a/reference/xlswriter/book.xml b/reference/xlswriter/book.xml
index 7b1c07064a2..fd815dd6c80 100644
--- a/reference/xlswriter/book.xml
+++ b/reference/xlswriter/book.xml
@@ -16,7 +16,6 @@
  <!-- }}} -->
 
  &reference.xlswriter.setup;
- &reference.xlswriter.constants;
  &reference.xlswriter.xlsx-kernel;
  &reference.xlswriter.xlsx-format;