diff --git a/src/services/ContentService.js b/src/services/ContentService.js
index 1821905..3c60510 100644
--- a/src/services/ContentService.js
+++ b/src/services/ContentService.js
@@ -565,15 +565,21 @@ define(["structures/ContentCreateStruct", "structures/ContentUpdateStruct", "str
      *
      * @method loadUserDrafts
      * @param userId {String} target user identifier (e.g. "/api/ezp/v2/user/users/14")
+     * @parma [headers] {Object} additional headers
      * @param callback {Function} callback executed after performing the request (see
      *  {{#crossLink "ContentService"}} Note on the callbacks usage{{/crossLink}} for more info)
      */
-    ContentService.prototype.loadUserDrafts = function (userId, callback) {
+    ContentService.prototype.loadUserDrafts = function (userId, headers, callback) {
+        if ( !callback ) {
+            callback = headers;
+            headers = {};
+        }
+        headers.Accept = "application/vnd.ez.api.VersionList+json";
         this._connectionManager.request(
             "GET",
             userId + "/drafts",
             "",
-            {"Accept": "application/vnd.ez.api.VersionList+json"},
+            headers,
             callback
         );
     };
@@ -668,12 +674,20 @@ define(["structures/ContentCreateStruct", "structures/ContentUpdateStruct", "str
      *
      * @method loadVersions
      * @param contentId {String} target content identifier (e.g. "/api/ezp/v2/content/objects/108")
+     * @param [headers] {Object}
      * @param callback {Function} callback executed after performing the request (see
      *  {{#crossLink "ContentService"}}Note on the callbacks usage{{/crossLink}} for more info)
      */
-    ContentService.prototype.loadVersions = function (contentId, callback) {
+    ContentService.prototype.loadVersions = function (contentId, headers, callback) {
         var that = this;
 
+        if ( !callback ) {
+            callback = headers;
+            headers = {};
+        }
+
+        // TODO instead of loading the content info and then the corresponding
+        // versions we could maybe use REST embedding here as well.
         this.loadContentInfo(
             contentId,
             function (error, contentResponse) {
@@ -684,11 +698,12 @@ define(["structures/ContentCreateStruct", "structures/ContentUpdateStruct", "str
 
                 var contentVersions = contentResponse.document.Content.Versions;
 
+                headers.Accept = contentVersions["_media-type"];
                 that._connectionManager.request(
                     "GET",
                     contentVersions._href,
                     "",
-                    {"Accept": contentVersions["_media-type"]},
+                    headers,
                     callback
                 );
             }