Index: /trunk/src/org/openstreetmap/josm/actions/mapmode/SelectLassoAction.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/actions/mapmode/SelectLassoAction.java	(revision 18121)
+++ /trunk/src/org/openstreetmap/josm/actions/mapmode/SelectLassoAction.java	(revision 18122)
@@ -2,4 +2,5 @@
 package org.openstreetmap.josm.actions.mapmode;
 
+import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
 import static org.openstreetmap.josm.tools.I18n.tr;
 
@@ -27,4 +28,5 @@
                 Shortcut.registerShortcut("mapmode:lasso", tr("Mode: {0}", tr("Lasso Mode")), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE),
                 ImageProvider.getCursor("normal", "rope"));
+        setHelpId(ht("/Action/LassoMode"));
     }