Index: /trunk/src/org/openstreetmap/josm/gui/history/HistoryBrowserDialog.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/history/HistoryBrowserDialog.java	(revision 4296)
+++ /trunk/src/org/openstreetmap/josm/gui/history/HistoryBrowserDialog.java	(revision 4297)
@@ -9,11 +9,14 @@
 import java.awt.FlowLayout;
 import java.awt.event.ActionEvent;
+import java.awt.event.KeyEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 
 import javax.swing.AbstractAction;
+import javax.swing.JComponent;
 import javax.swing.JDialog;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
+import javax.swing.KeyStroke;
 
 import org.openstreetmap.josm.Main;
@@ -73,4 +76,8 @@
 
         btn = new SideButton(closeAction = new CloseAction());
+        final String closeHistoryBrowserDialogKey = "CloseHistoryBrowserDialog";
+        KeyStroke escapeKey = KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0, false);
+        getRootPane().getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(escapeKey, closeHistoryBrowserDialogKey);
+        getRootPane().getActionMap().put(closeHistoryBrowserDialogKey, closeAction);
         btn.setName("btn.close");
         pnl.add(btn);