diff --git a/Makefile b/Makefile
index bd3314b42ec26e6745001a44c9d3d207bbf57ea8..dffed1b8a1e1f9c3c1fc4aeec02bebf01e466d39 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,8 @@ LOCALJARS=$(shell if [ -d lib ]; then find lib -name "*.jar" -print |xargs echo
 
 # classpath
 JUNITCLASSPATH:=./java/:./resources/:/usr/share/java/junit4.jar
-CLASSPATH:=$(shell find ${ROSETTASDK} -name "*.jar" -print | xargs echo | sed -e "s/ /:/g"):${LOCALJARS}
+COMMONSCLIJAR:=/usr/share/java/commons-cli.jar
+CLASSPATH:=$(shell find ${ROSETTASDK} -name "*.jar" -print | xargs echo | sed -e "s/ /:/g"):${LOCALJARS}:${COMMONSCLIJAR}
 
 # sources
 PLUGINCLASS:=XmlFormatValidationPlugin