diff --git a/core/modules/widgets/fieldmangler.js b/core/modules/widgets/fieldmangler.js
index 97fa683b8..86e6fd823 100644
--- a/core/modules/widgets/fieldmangler.js
+++ b/core/modules/widgets/fieldmangler.js
@@ -75,7 +75,7 @@ FieldManglerWidget.prototype.handleAddFieldEvent = function(event) {
 	if(tiddler && typeof event.param === "string") {
 		var name = event.param.toLowerCase();
 		if(name !== "" && !$tw.utils.hop(tiddler.fields,name)) {
-			var addition = {};
+			var addition = this.wiki.getModificationFields();
 			addition[name] = "";
 			this.wiki.addTiddler(new $tw.Tiddler(tiddler,addition));
 		}
@@ -88,7 +88,7 @@ FieldManglerWidget.prototype.handleRemoveTagEvent = function(event) {
 	if(tiddler && tiddler.fields.tags) {
 		var p = tiddler.fields.tags.indexOf(event.param);
 		if(p !== -1) {
-			var modification = {};
+			var modification = this.wiki.getModificationFields();
 			modification.tags = (tiddler.fields.tags || []).slice(0);
 			modification.tags.splice(p,1);
 		this.wiki.addTiddler(new $tw.Tiddler(tiddler,modification));
@@ -100,7 +100,7 @@ FieldManglerWidget.prototype.handleRemoveTagEvent = function(event) {
 FieldManglerWidget.prototype.handleAddTagEvent = function(event) {
 	var tiddler = this.wiki.getTiddler(this.mangleTitle);
 	if(tiddler && typeof event.param === "string" && event.param !== "") {
-		var modification = {};
+		var modification = this.wiki.getModificationFields();
 		modification.tags = (tiddler.fields.tags || []).slice(0);
 		$tw.utils.pushTop(modification.tags,event.param);
 		this.wiki.addTiddler(new $tw.Tiddler(tiddler,modification));