diff --git a/index.js b/index.js
index c44a890..0801576 100644
--- a/index.js
+++ b/index.js
@@ -39,7 +39,9 @@ function compile(filter) {
 }
 
 function compilePropertyReference(property) {
-    return property === '$type' ? 'f.type' : 'p[' + JSON.stringify(property) + ']';
+    return property === '$type' ? 'f.type' :
+        property === '$id' ? 'f.id' :
+        'p[' + JSON.stringify(property) + ']';
 }
 
 function compileComparisonOp(property, value, op, checkType) {
diff --git a/test.js b/test.js
index 0e84896..46cbbbb 100644
--- a/test.js
+++ b/test.js
@@ -50,6 +50,16 @@ test('==, $type', function(t) {
     t.end();
 });
 
+test('==, $id', function(t) {
+    var f = filter(['==', '$id', 1234]);
+
+    t.equal(f({id: 1234}), true);
+    t.equal(f({id: '1234'}), false);
+    t.equal(f({properties: {id: 1234}}), false);
+
+    t.end();
+});
+
 test('!=, string', function(t) {
     var f = filter(['!=', 'foo', 'bar']);
     t.equal(f({properties: {foo: 'bar'}}), false);