diff --git a/build/update.sh b/build/update.sh
index 0cdc4959029c..92c7133f8e1a 100755
--- a/build/update.sh
+++ b/build/update.sh
@@ -34,9 +34,8 @@ fi
 echo "Updating $WORK_IDEA_HOME from compiled classes in $DEV_IDEA_HOME"
 
 ANT_HOME="$DEV_IDEA_HOME/lib/ant"
-ANT_CLASSPATH="$DEV_IDEA_HOME/build/lib/gant/lib/jps.jar"
 "$JAVA_BIN" -Xms64m -Xmx512m -Dant.home="$ANT_HOME" -classpath "$ANT_HOME/lib/ant-launcher.jar" org.apache.tools.ant.launch.Launcher \
- -lib "$ANT_CLASSPATH" -f "$DEV_IDEA_HOME/build/update.xml" -Dwork.idea.home="$WORK_IDEA_HOME" ${TARGET}
+ -f "$DEV_IDEA_HOME/build/update.xml" -Dwork.idea.home="$WORK_IDEA_HOME" ${TARGET}
 
 if [ "$?" != "0" ]; then
   echo "Update failed; work IDEA build not modified."