diff --git a/build/build.xml b/build/build.xml
index 0026947..75b382b 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -170,11 +170,14 @@
         </condition>
         <condition property="java.not.ok" value="true">
             <not>
-                <contains string="${ant.java.version}" substring="1.5"/>
+                <or>
+                    <contains string="${ant.java.version}" substring="1.5"/>
+                    <contains string="${ant.java.version}" substring="1.6"/>
+                </or>
             </not>
         </condition>
-        <fail if="ant.not.ok" message="Must use Ant 1.6.x to build Connection Manager"/>
-        <fail if="java.not.ok" message="Must use JDK 1.5.x to build Connection Manager"/>
+        <fail if="ant.not.ok" message="Must use Ant 1.6.x or 1.7.x to build Connection Manager"/>
+        <fail if="java.not.ok" message="Must use JDK 1.5.x or higher to build Connection Manager"/>
 
         <tstamp/>
         <tstamp>