diff --git a/releasenotes.txt b/releasenotes.txt
index 28ead8fe1b3..bee48f451cc 100644
--- a/releasenotes.txt
+++ b/releasenotes.txt
@@ -192,6 +192,14 @@ Release notes - NHibernate - Version 5.1.0
 As part of releasing 5.1.0, a missing 5.0.0 possible breaking change has been added about inequality semantic in LINQ
 queries. See 5.0.0 possible breaking changes.
 
+Build 5.0.4
+=============================
+
+Release notes - NHibernate - Version 5.0.4
+
+** Bug
+    * #1658 Add missing cache setting
+
 Build 5.0.3
 =============================
 
diff --git a/src/NHibernate/nhibernate-configuration.xsd b/src/NHibernate/nhibernate-configuration.xsd
index ff7d776242e..d7deccc57e7 100644
--- a/src/NHibernate/nhibernate-configuration.xsd
+++ b/src/NHibernate/nhibernate-configuration.xsd
@@ -90,6 +90,15 @@
 								<xs:enumeration value="cache.region_prefix" />
 								<xs:enumeration value="cache.use_minimal_puts" />
 								<xs:enumeration value="cache.default_expiration" />
+								<xs:enumeration value="cache.use_sliding_expiration">
+									<xs:annotation>
+										<xs:documentation>
+											The use_sliding_expiration value is whether you wish to use a sliding expiration or not. Defaults
+											to false. Not all providers support this setting, it may be ignored. Check their respective
+											documentation.
+										</xs:documentation>
+									</xs:annotation>
+								</xs:enumeration>
 								<xs:enumeration value="query.substitutions" />
 								<xs:enumeration value="query.factory_class" />
 								<xs:enumeration value="query.linq_provider_class" />