Index: /trunk/build.xml
===================================================================
--- /trunk/build.xml	(revision 12427)
+++ /trunk/build.xml	(revision 12428)
@@ -36,5 +36,5 @@
         <!-- For Java9-specific stuff -->
         <condition property="isJava9">
-            <equals arg1="${ant.java.version}" arg2="1.9" />
+            <matches string="${ant.java.version}" pattern="(1.)?9" />
         </condition>
         <path id="test.classpath">