Index: /applications/editors/josm/plugins/FixAddresses/src/org/openstreetmap/josm/plugins/fixAddresses/NodeEntityBase.java
===================================================================
--- /applications/editors/josm/plugins/FixAddresses/src/org/openstreetmap/josm/plugins/fixAddresses/NodeEntityBase.java	(revision 23970)
+++ /applications/editors/josm/plugins/FixAddresses/src/org/openstreetmap/josm/plugins/fixAddresses/NodeEntityBase.java	(revision 23971)
@@ -146,7 +146,9 @@
 		if (StringUtils.isNullOrEmpty(tag)) return;
 		
-		if (osmObject != null && osmObject.hasKey(tag)) {
-			fireCommandIssued(new ChangePropertyCommand(osmObject, tag, newValue));
-			fireEntityChanged(this);
+		if (osmObject != null) {
+			if ((osmObject.hasKey(tag) && newValue == null) || newValue != null) {			
+				fireCommandIssued(new ChangePropertyCommand(osmObject, tag, newValue));
+				fireEntityChanged(this);
+			}
 		} 
 	}