System property substitution does not work in subnet-match

<property name="subnet" value="192.168.0.0/16"/>
...
<interface name="public">
    <subnet-match value="${subnet}"/>
</interface>

12:36:13,457 ERROR [org.jboss.as.server] (Controller Boot Thread) JBAS015956: Caught exception during boot: org.jboss.as.controller.persistence.ConfigurationPersistenceException: JBAS014676: Failed to parse configuration
	at org.jboss.as.controller.persistence.XmlConfigurationPersister.load(XmlConfigurationPersister.java:112) [wildfly-controller-8.0.0.Final.jar:8.0.0.Final]
	at org.jboss.as.server.ServerService.boot(ServerService.java:331) [wildfly-server-8.0.0.Final.jar:8.0.0.Final]
	at org.jboss.as.controller.AbstractControllerService$1.run(AbstractControllerService.java:256) [wildfly-controller-8.0.0.Final.jar:8.0.0.Final]
	at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_45]
Caused by: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[311,46]
Message: JBAS014693: Invalid 'value' ${subnet} -- must be of the form address/mask
	at org.jboss.as.server.parsing.CommonXml.validateAddressMask(CommonXml.java:605) [wildfly-server-8.0.0.Final.jar:8.0.0.Final]
	at org.jboss.as.server.parsing.CommonXml.parseSimpleInterfaceCriterion(CommonXml.java:587) [wildfly-server-8.0.0.Final.jar:8.0.0.Final]
	at org.jboss.as.server.parsing.CommonXml.parseInterfaceCriteria(CommonXml.java:467) [wildfly-server-8.0.0.Final.jar:8.0.0.Final]
	at org.jboss.as.server.parsing.CommonXml.parseInterfaces(CommonXml.java:644) [wildfly-server-8.0.0.Final.jar:8.0.0.Final]
	at org.jboss.as.server.parsing.StandaloneXml.readServerElement_1_4(StandaloneXml.java:465) [wildfly-server-8.0.0.Final.jar:8.0.0.Final]
	at org.jboss.as.server.parsing.StandaloneXml.readElement(StandaloneXml.java:145) [wildfly-server-8.0.0.Final.jar:8.0.0.Final]
	at org.jboss.as.server.parsing.StandaloneXml.readElement(StandaloneXml.java:107) [wildfly-server-8.0.0.Final.jar:8.0.0.Final]
	at org.jboss.staxmapper.XMLMapperImpl.processNested(XMLMapperImpl.java:110) [staxmapper-1.1.0.Final.jar:1.1.0.Final]
	at org.jboss.staxmapper.XMLMapperImpl.parseDocument(XMLMapperImpl.java:69) [staxmapper-1.1.0.Final.jar:1.1.0.Final]
	at org.jboss.as.controller.persistence.XmlConfigurationPersister.load(XmlConfigurationPersister.java:104) [wildfly-controller-8.0.0.Final.jar:8.0.0.Final]
	... 3 more