diff --git a/harvester/harvester-core/src/main/java/dk/netarkivet/harvester/webinterface/servlet/Heritrix3JobMonitorThread.java b/harvester/harvester-core/src/main/java/dk/netarkivet/harvester/webinterface/servlet/Heritrix3JobMonitorThread.java
index e20e09486f..5a9888597f 100644
--- a/harvester/harvester-core/src/main/java/dk/netarkivet/harvester/webinterface/servlet/Heritrix3JobMonitorThread.java
+++ b/harvester/harvester-core/src/main/java/dk/netarkivet/harvester/webinterface/servlet/Heritrix3JobMonitorThread.java
@@ -63,8 +63,6 @@ public class Heritrix3JobMonitorThread implements Runnable {
     /** A map from harvest job number to the running H3 job monitor for the given job */
     public Map<Long, Heritrix3JobMonitor> runningJobMonitorMap = new TreeMap<Long, Heritrix3JobMonitor>();
 
-    private final Object runningJobMonitorMapSynchronizer = new Object();
-
     public Map<Long, Heritrix3JobMonitor> filterJobMonitorMap = new TreeMap<Long, Heritrix3JobMonitor>();
 
     public final Set<String> h3HostPortSet = new HashSet<String>();
@@ -125,7 +123,7 @@ public boolean accept(File dir, String name) {
                     Heritrix3JobMonitor jobmonitor;
 
                     Iterator<Long> jobidIter = runningJobs.iterator();
-                    synchronized (runningJobMonitorMapSynchronizer) {
+                    synchronized (this) {
                         filterJobMonitorMap.clear();
 
                         // For all running jobs..
@@ -229,7 +227,7 @@ public Set<Long> getRunningJobs() {
 
     public Heritrix3JobMonitor getRunningH3Job(long jobId) {
         Heritrix3JobMonitor h3Job;
-        synchronized (runningJobMonitorMapSynchronizer) {
+        synchronized (this) {
             h3Job = runningJobMonitorMap.get(jobId);
         }
         return h3Job;
@@ -237,7 +235,7 @@ public Heritrix3JobMonitor getRunningH3Job(long jobId) {
 
     public List<Heritrix3JobMonitor> getRunningH3Jobs() {
         List<Heritrix3JobMonitor> h3JobsList = new LinkedList<Heritrix3JobMonitor>();
-        synchronized (runningJobMonitorMapSynchronizer) {
+        synchronized (this) {
             h3JobsList.addAll(runningJobMonitorMap.values());
         }
         return h3JobsList;