Index: /trunk/src/org/openstreetmap/josm/actions/ValidateAction.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/actions/ValidateAction.java	(revision 15607)
+++ /trunk/src/org/openstreetmap/josm/actions/ValidateAction.java	(revision 15608)
@@ -12,5 +12,4 @@
 import java.util.Optional;
 
-import org.openstreetmap.josm.data.osm.DataSet;
 import org.openstreetmap.josm.data.osm.OsmPrimitive;
 import org.openstreetmap.josm.data.preferences.sources.ValidatorPrefHelper;
@@ -96,6 +95,5 @@
     @Override
     public void updateEnabledState() {
-        DataSet ds = getLayerManager().getActiveDataSet();
-        setEnabled(ds != null && !ds.isEmpty());
+        setEnabled(getLayerManager().getActiveDataSet() != null);
     }