diff --git a/js/id/presets/field.js b/js/id/presets/field.js
index afbb9f4cb..a82813243 100644
--- a/js/id/presets/field.js
+++ b/js/id/presets/field.js
@@ -4,7 +4,7 @@ iD.presets.Field = function(id, field) {
     field.id = id;
 
     field.matchGeometry = function(geometry) {
-        return !field.geometry || field.geometry.indexOf(geometry) >= 0;
+        return !field.geometry || field.geometry === geometry;
     };
 
     field.t = function(scope, options) {