diff --git a/javascript/FieldEditor.js b/javascript/FieldEditor.js
index 6bab7a533..a21c09121 100755
--- a/javascript/FieldEditor.js
+++ b/javascript/FieldEditor.js
@@ -509,7 +509,7 @@ Behaviour.register(
 				if( Element.hasClassName( $('Fields'), 'readonly' ) )
 					return false;
 				
-				action = this.urlForFieldMethod("addfield") + "&Type=" + this.id;
+				action = this.urlForFieldMethod("addfield") + "&Type=" + this.id + ($('SecurityID') ? '&SecurityID=' + $('SecurityID').value : '');;
 				
 				statusMessage('Adding new field' );
 
@@ -551,4 +551,4 @@ function reportError(request){
 	// More complex error for developers
 	statusMessage(request.responseText,'bad');
 
-}
\ No newline at end of file
+}