diff --git a/build.xml b/build.xml
index af222d75f..ee9d17f0a 100644
--- a/build.xml
+++ b/build.xml
@@ -243,6 +243,7 @@
       <zipfileset src="${deploy.dir}/lib/velocity-1.5-dev.jar"/>
       <zipfileset src="${deploy.dir}/lib/javassist.jar"/>
       <zipfileset src="${deploy.dir}/lib/google-collect.jar"/>
+      <zipfileset src="${deploy.dir}/lib/commons-collections.jar"/>
     </jar>
     <jar destfile="${deploy.dir}/${lib.name}-tests.jar">
       <fileset dir="tests/${classes.dir}" includes="com/threerings/**"/>
diff --git a/etc/libs-incl.xml b/etc/libs-incl.xml
index 2ff6960f1..b0394811b 100644
--- a/etc/libs-incl.xml
+++ b/etc/libs-incl.xml
@@ -5,6 +5,7 @@
     <include name="ant.jar"/>
     <include name="atunit.jar"/>
     <include name="asc.jar"/>
+    <include name="commons-collections.jar"/>
     <include name="depot.jar"/>
     <include name="ehcache.jar"/>
     <include name="flexTasks.jar"/>