diff --git a/bundles/org.eclipse.equinox.concurrent/src/org/eclipse/equinox/concurrent/future/FutureProgressMonitor.java b/bundles/org.eclipse.equinox.concurrent/src/org/eclipse/equinox/concurrent/future/FutureProgressMonitor.java
index 5d99677d7f..597cde6659 100644
--- a/bundles/org.eclipse.equinox.concurrent/src/org/eclipse/equinox/concurrent/future/FutureProgressMonitor.java
+++ b/bundles/org.eclipse.equinox.concurrent/src/org/eclipse/equinox/concurrent/future/FutureProgressMonitor.java
@@ -27,7 +27,7 @@
 public class FutureProgressMonitor extends ProgressMonitorWrapper {
 
 	private IProgressMonitor monitor;
-	private Object lock = new Object();
+	private final Object lock = new Object();
 
 	/**
 	 * Create a new progress monitor wrapping the given monitor. The nested monitor