diff --git a/app/src/processing/app/contrib/ContributionTab.java b/app/src/processing/app/contrib/ContributionTab.java
index b10801ca4..6eb01819e 100644
--- a/app/src/processing/app/contrib/ContributionTab.java
+++ b/app/src/processing/app/contrib/ContributionTab.java
@@ -228,8 +228,7 @@ public class ContributionTab extends JPanel {
     StyleConstants.setAlignment(center, StyleConstants.ALIGN_CENTER);
     doc.setParagraphAttributes(0, doc.getLength(), center, false);
 
-    // TODO https://github.com/processing/processing/issues/3706
-    closeButton = new JButton("X");
+    closeButton = new JButton(Toolkit.getLibIconX("manager/close"));
     closeButton.setContentAreaFilled(false);
     closeButton.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent e) {