diff --git a/osx/Library/Application Support/Jenkins/jenkins-runner.sh b/osx/Library/Application Support/Jenkins/jenkins-runner.sh
index c167c4a8a4e724f5cc66d83ab25c76e1bb596ab0..cfed641008a40b36c4bc3294cd3cb76dd7cff1ca 100755
--- a/osx/Library/Application Support/Jenkins/jenkins-runner.sh	
+++ b/osx/Library/Application Support/Jenkins/jenkins-runner.sh	
@@ -16,6 +16,7 @@ war=`$defaults war` || war="/Applications/Jenkins/jenkins.war"
 
 javaArgs=""
 heapSize=`$defaults heapSize` && javaArgs="$javaArgs -Xmx${heapSize}"
+permGen=`$defaults permGen` && javaArgs="$javaArgs -XX:MaxPermSize=${permGen}"
 
 home=`$defaults JENKINS_HOME` && export JENKINS_HOME="$home"