diff --git a/expat/doc/reference.html b/expat/doc/reference.html
index 8007f253..e5972f48 100644
--- a/expat/doc/reference.html
+++ b/expat/doc/reference.html
@@ -360,6 +360,33 @@ and the definition of character types in the case of
XML_UNICODE_WCHAR_T. The symbols are:
+- XML_GE
+-
+Added in Expat 2.6.0.
+Include support for
+general entities
+(syntax
&e1; to reference and
+syntax <!ENTITY e1 'value1'> (an internal general entity) or
+<!ENTITY e2 SYSTEM 'file2'> (an external general entity) to declare).
+With XML_GE enabled, general entities will be replaced by their declared replacement text;
+for this to work for external general entities, in addition an
+XML_ExternalEntityRefHandler must be set using
+XML_SetExternalEntityRefHandler.
+Also, enabling XML_GE makes
+the functions
+XML_SetBillionLaughsAttackProtectionMaximumAmplification and
+
+XML_SetBillionLaughsAttackProtectionActivationThreshold available.
+
+With XML_GE disabled, Expat has a smaller memory footprint and can be faster, but will
+not load external general entities and will replace all general entities
+(except the predefined five:
+amp, apos, gt, lt, quot)
+with a self-reference:
+for example, referencing an entity e1 via &e1; will be replaced
+by text &e1;.
+
+
- XML_DTD
- Include support for using and reporting DTD-based content. If
this is defined, default attribute values from an external DTD subset