diff --git a/javascript/TreeDropdownField.js b/javascript/TreeDropdownField.js
index 418e193a5..f58ef2375 100644
--- a/javascript/TreeDropdownField.js
+++ b/javascript/TreeDropdownField.js
@@ -53,6 +53,8 @@
 			},
 			setValue: function(val) {
 				this.find(':input:hidden').val(val);
+				
+				this.trigger('change');
 			},
 			getValue: function() {
 				return this.find(':input:hidden').val();