diff --git a/src/osgTerrain/Layer.cpp b/src/osgTerrain/Layer.cpp
index bbd01c9f0..f655a48df 100644
--- a/src/osgTerrain/Layer.cpp
+++ b/src/osgTerrain/Layer.cpp
@@ -338,3 +338,7 @@ CompositeLayer::CompositeLayer(const CompositeLayer& compositeLayer,const osg::C
 }
 
 
+void CompositeLayer::clear()
+{
+    _layers.clear();
+}