diff --git a/build.xml b/build.xml
index bd4917338..64c76bfdb 100644
--- a/build.xml
+++ b/build.xml
@@ -91,8 +91,7 @@
     <taskdef name="genscript" classpathref="classpath"
              classname="com.threerings.presents.tools.GenActionScriptTask"/>
     <!-- now generate the associated files -->
-    <genscript header="lib/SOURCE_HEADER" asroot="src/as"
-              classpathref="classpath">
+    <genscript header="lib/SOURCE_HEADER" asroot="src/as">
       <fileset dir="src/java" includes="**/data/*.java"/>
     </genscript>
   </target>