diff --git a/source/java/org/alfresco/rest/framework/webscripts/ResourceWebScriptPost.java b/source/java/org/alfresco/rest/framework/webscripts/ResourceWebScriptPost.java
index fcd4364913..d75c3c274e 100644
--- a/source/java/org/alfresco/rest/framework/webscripts/ResourceWebScriptPost.java
+++ b/source/java/org/alfresco/rest/framework/webscripts/ResourceWebScriptPost.java
@@ -1,3 +1,22 @@
+/*
+ * Copyright (C) 2005-2015 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+
 package org.alfresco.rest.framework.webscripts;
 
 import java.util.Arrays;
@@ -153,7 +172,7 @@ public class ResourceWebScriptPost extends AbstractResourceWebScript implements
                     throw new DeletedResourceException("(DELETE) " + resource.getMetaData().getUniqueId());
                 }
 
-                if (resObj instanceof MultiPartResourceAction.Create<?>)
+                if (resObj instanceof MultiPartResourceAction.Create<?> && params.getPassedIn() instanceof FormData)
                 {
                     MultiPartResourceAction.Create<Object> creator = (MultiPartResourceAction.Create<Object>) resObj;
                     return creator.create((FormData) params.getPassedIn(), params);
@@ -180,7 +199,7 @@ public class ResourceWebScriptPost extends AbstractResourceWebScript implements
                     throw new DeletedResourceException("(DELETE) " + resource.getMetaData().getUniqueId());
                 }
 
-                if (resObj instanceof MultiPartRelationshipResourceAction.Create<?>)
+                if (resObj instanceof MultiPartRelationshipResourceAction.Create<?> && params.getPassedIn() instanceof FormData)
                 {
                     MultiPartRelationshipResourceAction.Create<Object> creator = (MultiPartRelationshipResourceAction.Create<Object>) resObj;
                     return creator.create(params.getEntityId(), (FormData) params.getPassedIn(), params);