diff --git a/hyracks/hyracks-storage-am-rtree/pom.xml b/hyracks/hyracks-storage-am-rtree/pom.xml
index 61620ec..fd432ff 100644
--- a/hyracks/hyracks-storage-am-rtree/pom.xml
+++ b/hyracks/hyracks-storage-am-rtree/pom.xml
@@ -20,6 +20,7 @@
         <configuration>
           <source>1.6</source>
           <target>1.6</target>
+          <fork>true</fork>
         </configuration>
       </plugin>
     </plugins>