diff --git a/libraries/script-engine/src/AssetScriptingInterface.cpp b/libraries/script-engine/src/AssetScriptingInterface.cpp
index 1c5a7ff7ba..e0e04a1e25 100644
--- a/libraries/script-engine/src/AssetScriptingInterface.cpp
+++ b/libraries/script-engine/src/AssetScriptingInterface.cpp
@@ -61,13 +61,15 @@ void AssetScriptingInterface::getMapping(QString path, QScriptValue callback) {
         auto result = request->getError();
         if (callback.isFunction()) {
             if (result == GetMappingRequest::NotFound) {
-                QScriptValueList args { "" };
+                QScriptValueList args { "", true };
                 callback.call(_engine->currentContext()->thisObject(), args);
             } else if (result == GetMappingRequest::NoError) {
-                QScriptValueList args { request->getHash() };
+                QScriptValueList args { request->getHash(), true };
                 callback.call(_engine->currentContext()->thisObject(), args);
             } else {
                 qCDebug(scriptengine) << "error -- " << request->getError() << " -- " << request->getErrorString();
+                QScriptValueList args { "", false };
+                callback.call(_engine->currentContext()->thisObject(), args);
             }
             request->deleteLater();
         }
diff --git a/libraries/script-engine/src/AssetScriptingInterface.h b/libraries/script-engine/src/AssetScriptingInterface.h
index 0964a4f5e2..dded2ef21d 100644
--- a/libraries/script-engine/src/AssetScriptingInterface.h
+++ b/libraries/script-engine/src/AssetScriptingInterface.h
@@ -85,9 +85,10 @@ public:
      */
 
     /**jsdoc
-     * Called when getMapping is complete
+     * Called when getMapping is complete.
      * @callback Assets~getMappingCallback
-     * @param {string} assetID
+     * @param assetID {string} hash value if found, else an empty string
+     * @param success {boolean} false for errors other than "not found", else true
      */
     Q_INVOKABLE void getMapping(QString path, QScriptValue callback);