diff --git a/org.eclipse.ui.externaltools/External Tools Base/org/eclipse/ui/externaltools/internal/ui/TreeAndListGroup.java b/org.eclipse.ui.externaltools/External Tools Base/org/eclipse/ui/externaltools/internal/ui/TreeAndListGroup.java
index 6f79279..ab548ba 100644
--- a/org.eclipse.ui.externaltools/External Tools Base/org/eclipse/ui/externaltools/internal/ui/TreeAndListGroup.java
+++ b/org.eclipse.ui.externaltools/External Tools Base/org/eclipse/ui/externaltools/internal/ui/TreeAndListGroup.java
@@ -177,7 +177,7 @@
 		listViewer.setContentProvider(listContentProvider);
 		listViewer.setLabelProvider(listLabelProvider);
 		listViewer.setComparator(new ResourceComparator(ResourceComparator.NAME));
-		listViewer.addSelectionChangedListener(event -> notifySelectionListeners(event));
+		listViewer.addSelectionChangedListener(this::notifySelectionListeners);
 		listViewer.addDoubleClickListener(event -> {
 			if (!event.getSelection().isEmpty()) {
 				notifyDoubleClickListeners(event);