diff --git a/src/Main/renderer.cxx b/src/Main/renderer.cxx
index b4dcbc9e7..87e8932c1 100644
--- a/src/Main/renderer.cxx
+++ b/src/Main/renderer.cxx
@@ -1048,7 +1048,14 @@ FGRenderer::pick( unsigned x, unsigned y,
   }
 }
 
-bool fgDumpSceneGraphToFile(const char* filename)
+void
+FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
+{
+    mRealRoot->addChild(camera);
+}
+
+bool
+fgDumpSceneGraphToFile(const char* filename)
 {
     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 }
diff --git a/src/Main/renderer.hxx b/src/Main/renderer.hxx
index ea14d3534..3fb7e0f83 100644
--- a/src/Main/renderer.hxx
+++ b/src/Main/renderer.hxx
@@ -6,6 +6,7 @@
 #include <simgear/scene/sky/sky.hxx>
 #include <simgear/scene/util/SGPickCallback.hxx>
 
+#include <osg/Camera>
 #include <osgViewer/Viewer>
 
 #include "FGManipulator.hxx"
@@ -66,10 +67,14 @@ public:
      */
     FGManipulator* getManipulator() { return manipulator.get(); }
     const FGManipulator* getManipulator() const { return manipulator.get(); }
-    void setManipulator(FGManipulator* manipulator)
-	{
-	    this->manipulator = manipulator;
-	}
+    void setManipulator(FGManipulator* manipulator) {
+        this->manipulator = manipulator;
+    }
+
+    /** Add a top level camera.
+    */
+    void addCamera(osg::Camera* camera, bool useSceneData);
+
 protected:
     osg::ref_ptr<osgViewer::Viewer> viewer;
     osg::ref_ptr<FGManipulator> manipulator;