diff --git a/art b/art
index 180d77379adb6537595fc1b98b8891c9afaf550f..f8fe4fe68b42da14fac53d7ca48735e3b515c3e8 100755
--- a/art
+++ b/art
@@ -40,6 +40,9 @@ export CLASSPATH
 
 # picard jars
 CLASSPATH=$ARTEMIS_HOME/lib/picard/sam.jar:$ARTEMIS_HOME/lib/picard/picard.jar:$ARTEMIS_HOME/lib/commons-net-2.2.jar:$CLASSPATH
+
+CLASSPATH="$ARTEMIS_HOME/lib/commons-lang-2.6.jar:$CLASSPATH"
+
 export CLASSPATH