diff --git a/idea/testData/checker/Builders.jet b/idea/testData/checker/Builders.jet
index 7b21d18e112..e8a87739916 100644
--- a/idea/testData/checker/Builders.jet
+++ b/idea/testData/checker/Builders.jet
@@ -70,9 +70,12 @@ import java.util.*
   class P() : BodyTag("p")
   class H1() : BodyTag("h1")
   class A() : BodyTag("a") {
-    var href : String
+    var href : String?
       get() = attributes["href"]
-      set(value) { attributes["href"] = value }
+      set(value) {
+        if (value != null)
+        attributes["href"] = value
+      }
   }
 
   fun Map<String, String>.set(key : String, value : String) = this.put(key, value)