diff --git a/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java b/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
index 6b9fea51743..e06374a545a 100644
--- a/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
+++ b/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
@@ -256,6 +256,7 @@ private class PackageExplorerProblemTreeViewer extends ProblemTreeViewer {
 		public PackageExplorerProblemTreeViewer(Composite parent, int style) {
 			super(parent, style);
 			fPendingRefreshes= Collections.synchronizedList(new ArrayList<>());
+			setAutoExpandOnSingleChildLevels(ALL_LEVELS);
 		}
 		@Override
 		public void add(Object parentElement, Object... childElements) {
@@ -576,7 +577,7 @@ private void initFrameActions() {
 	}
 
 	private ProblemTreeViewer createViewer(Composite composite) {
-		return new PackageExplorerProblemTreeViewer(composite, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
+		new PackageExplorerProblemTreeViewer(composite, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
 	}
 
 	/**