diff --git a/documentation/poky.ent b/documentation/poky.ent
index b5ab1f9651..49b19008f1 100644
--- a/documentation/poky.ent
+++ b/documentation/poky.ent
@@ -8,6 +8,7 @@
 <!ENTITY YOCTO_DOC_VERSION_MINUS_ONE "2.4">
 <!ENTITY DISTRO_REL_TAG "yocto-2.5">
 <!ENTITY METAINTELVERSION "9.0">
+<!ENTITY REL_MONTH_YEAR "May 2018">
 <!ENTITY META_INTEL_REL_TAG "&METAINTELVERSION;-&DISTRO_NAME_NO_CAP;-&YOCTO_DOC_VERSION;">
 <!ENTITY POKYVERSION "20.0.0">
 <!ENTITY POKYVERSION_COMPRESSED "2000">