diff --git a/providers/b2/src/main/java/org/jclouds/b2/filters/RequestAuthorization.java b/providers/b2/src/main/java/org/jclouds/b2/filters/RequestAuthorization.java
index b403a593226..784c7233269 100644
--- a/providers/b2/src/main/java/org/jclouds/b2/filters/RequestAuthorization.java
+++ b/providers/b2/src/main/java/org/jclouds/b2/filters/RequestAuthorization.java
@@ -17,6 +17,7 @@
 package org.jclouds.b2.filters;
 
 import java.net.URI;
+import java.nio.charset.StandardCharsets;
 
 import javax.inject.Inject;
 import javax.inject.Singleton;
@@ -50,9 +51,11 @@ public HttpRequest filter(HttpRequest request) throws HttpException {
             endpoint.getPath() +
             (endpoint.getQuery() == null ? "" : "?" + endpoint.getQuery()));
 
+      String updatedRequestBody = request.getPayload().getRawContent().toString().replaceAll("\"accountId\":.?\".*\"", "\"accountId\":\"" + auth.accountId() + "\"");
       request = request.toBuilder()
             .endpoint(endpoint)
             .replaceHeader(HttpHeaders.AUTHORIZATION, auth.authorizationToken())
+            .payload(updatedRequestBody)
             .build();
       return request;
    }