diff --git a/src/osgPlugins/osgjs/Animation.cpp b/src/osgPlugins/osgjs/Animation.cpp
index 37fe74e48..8c384b085 100644
--- a/src/osgPlugins/osgjs/Animation.cpp
+++ b/src/osgPlugins/osgjs/Animation.cpp
@@ -298,7 +298,7 @@ JSONObject* createJSONAnimation(osgAnimation::Animation* anim, WriteVisitor* wri
     return json.release();
 }
 
-JSONObject* createJSONUpdateMatrixTransform(osgAnimation::UpdateMatrixTransform& acb, WriteVisitor* writer)
+JSONObject* createJSONUpdateMatrixTransform(osgAnimation::UpdateMatrixTransform& acb, WriteVisitor* /*writer*/)
 {
     osg::ref_ptr<JSONObject> json = new JSONObject;
     json->addUniqueID();
diff --git a/src/osgPlugins/osgjs/WriteVisitor b/src/osgPlugins/osgjs/WriteVisitor
index c2e64d247..a129fcbff 100644
--- a/src/osgPlugins/osgjs/WriteVisitor
+++ b/src/osgPlugins/osgjs/WriteVisitor
@@ -290,7 +290,7 @@ public:
         }
     }
 
-    void applyCallback(osg::Node& node, JSONObject* json) {
+    void applyCallback(osg::Node& node, JSONObject* in_json) {
         osg::ref_ptr<JSONArray> updateCallbacks = new JSONArray;
         osg::ref_ptr<osg::Callback> nc = node.getUpdateCallback();
         while (nc) {
@@ -361,7 +361,7 @@ public:
         }
 
         if (!updateCallbacks->getArray().empty()) {
-            json->getMaps()["UpdateCallbacks"] = updateCallbacks;
+            in_json->getMaps()["UpdateCallbacks"] = updateCallbacks;
         }
     }