diff --git a/contrib/benchmark/CHANGES.txt b/contrib/benchmark/CHANGES.txt
index d9718d6530b..7ab24b17052 100644
--- a/contrib/benchmark/CHANGES.txt
+++ b/contrib/benchmark/CHANGES.txt
@@ -4,6 +4,11 @@ The Benchmark contrib package contains code for benchmarking Lucene in a variety
 
 $Id:$
 
+12/22/2009
+  LUCENE-2178: Allow multiple locations to add to the class path with
+  -Dbenchmark.ext.classpath=... when running "ant run-task" (Steven
+  Rowe via Mike McCandless)
+
 12/17/2009
   LUCENE-2168: Allow negative relative thread priority for BG tasks
   (Mike McCandless)
diff --git a/contrib/benchmark/build.xml b/contrib/benchmark/build.xml
index e996ebf210a..1eb7de389b5 100644
--- a/contrib/benchmark/build.xml
+++ b/contrib/benchmark/build.xml
@@ -114,7 +114,7 @@
     <path id="run.classpath">
         <path refid="classpath"/>
         <pathelement location="${build.dir}/classes/java"/>
-        <pathelement location="${benchmark.ext.classpath}"/>
+        <pathelement path="${benchmark.ext.classpath}"/>
     </path>
 
     <property name="task.alg" location="conf/micro-standard.alg"/>