diff --git a/api/src/main/java/com/ning/http/client/RequestBuilderBase.java b/api/src/main/java/com/ning/http/client/RequestBuilderBase.java
index 6aa0efeb3f..10f7d04658 100644
--- a/api/src/main/java/com/ning/http/client/RequestBuilderBase.java
+++ b/api/src/main/java/com/ning/http/client/RequestBuilderBase.java
@@ -367,6 +367,8 @@ protected RequestBuilderBase(Class<T> derived, Request prototype) {
 
     public T setUrl(String url) {
         request.originalUri = buildURI(url);
+        request.uri = null;
+        request.rawUri = null;
         return derived.cast(this);
     }