diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/PDOMManager.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/PDOMManager.java
index 5bf17ea5f29..7cc48e6bbcb 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/PDOMManager.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/PDOMManager.java
@@ -280,7 +280,7 @@ public class PDOMManager implements IWritableIndexManager, IListener {
 
 		if (jobToCancel != null) {
 			assert !Thread.holdsLock(fTaskQueue);
-			jobToCancel.cancelJobs(null, false);
+			jobToCancel.cancelJobs(null, true);
 		}
 		Job.getJobManager().removeJobChangeListener(fJobChangeListener);
 	}